Two facts about a Reddit thread's life decide most of your results on this channel, and neither is about writing.

First: a thread's comment section is largely settled in its first few hours. Early comments accumulate the early upvotes, upvoted comments rise, risen comments collect the next wave of votes, and by the time a thread peaks, the top slots have usually been compounding since the first 90 minutes. Arriving at hour twelve with the best answer in the thread means being the eleventh comment, collapsed below the fold, read by almost nobody.

Second: the threads worth arriving at are rarer than you think. We published the numbers from one 10-hour monitoring window in the 770-mentions post: 770 keyword mentions, of which exactly 2 were real buying conversations. A quarter of a percent.

Put the two together and the shape of the listening problem is clear: you need to find that quarter of a percent fast enough to be early, without drowning in the 99.7%. This post is the machinery for that.

Coverage: keywords are half, communities are the other half

Founders default to ego-and-category keywords: product name, competitor names, category term. Necessary, insufficient. The buying conversations that matter often contain none of those. They contain the problem: "how do you keep track of who mentions your product," "is there a way to watch subreddits for leads," "spending 2 hours a day on Reddit and getting nothing."

So the watch list needs two layers:

Keyword watches for names and category terms, sitewide: these catch the explicit mentions and the competitor complaints (the highest-intent thread on Reddit is someone publicly frustrated with the tool you compete against).
Community watches on the handful of subreddits where your buyers live: every new thread, skimmed cheaply, because problem-language threads don't contain your keywords. This is also where phrase-mining pays: spend a week noting the exact words buyers use for the problem, then promote the best phrases into keyword watches. Your buyers write your watch list; you just transcribe it.

Triage: most mentions deserve nothing

The 770-to-2 ratio makes the discipline obvious: the default action on a mention is no action. Skipping is not a failure of coverage, it's the point of coverage. The founder who replies to twenty marginal threads a day is building the burst-and-volume pattern that post 6 warned about, in threads that were never going to convert, with replies that necessarily got thinner as the day wore on.

The triage question stack, in order, cheapest first:

Is it actually about the problem? Keyword collisions are most of the 770. Kill on sight.
Is there a question or a live decision? Someone declaring an opinion needs no answer. Someone choosing, comparing, or stuck does.
Can you add something the thread doesn't have yet? If three comments already said your thing, the thread is served.
Is it fresh? Which brings us to the window.

Only a thread that passes all four earns a reply, and on a normal day for a niche product that's a small handful. That's not a weak channel. That's the channel: a small number of genuinely open doors beats a large number of walls.

The early-mover window

The compounding math from the top of this post has a practical consequence: freshness is a hard gate, not a preference. A thread under about 90 minutes old with few comments and visible activity is a live opportunity where your reply can become one of the anchor comments and ride the thread's entire life, including its afterlife in Google (surviving Reddit answers rank for years; that long tail is where a lot of the channel's compounding actually lives).

The same thread eight hours later is a different, worse opportunity: settled hierarchy, declining traffic, your reply entering at the bottom. And a days-old thread is usually not an opportunity at all; a founder reply landing in a dead thread reads as someone who searched their brand name and marched in, which is exactly what it is.

Two corollaries founders get wrong:

Speed without the relevance floor is worse than nothing. Racing to be first in a marginal thread combines the worst of everything: low-value reply, visible haste, volume pattern. The triage stack runs first; the clock only matters for threads that pass.
This is a checking-frequency problem, not a heroics problem. Being reliably inside 90-minute windows means the watch list gets swept hourly-ish during your waking hours. Checking once a day at 6pm structurally misses every morning window. This is the strongest argument for automating the watching (the machine sweeps every few minutes and never sleeps) even if every reply stays hand-written: the machine can be early so you can be good. It also composes cleanly with quiet hours from post 6: the overnight windows you miss by being human are a real but small cost, and the morning sweep catches the survivors.

The compounding loop

Run this machinery for a quarter and the pieces from the whole series click together: seasoned account (post 3), right communities (post 4), surviving replies (post 5), human pace (post 6), early arrival (this post). What emerges is a presence: your name keeps appearing, early and usefully, in exactly the threads your buyers read. People start recognizing the username. Mods stop scrutinizing. Search traffic finds the old answers and the old answers point at you. The channel's slow start and its compounding tail are the same property; posts 1 through 6 were about surviving the start, and the payoff arrives here.

Thread Otter is this post as software: keyword and community watches swept continuously, every mention scored for actual buying intent so the 770 collapse to the 2 worth seeing, fresh high-intent threads floated first, and drafts ready in your voice when a window is open. The triage judgment codified, the sweep tireless, the reply still yours.

This is post 7 of the 8-part Reddit for founders series. Next up, the finale: from comment to customer, or what the funnel looks like on the other side of a surviving reply.