What changed
A system crawl now sweeps a curated corpus of top business and tech subreddits every day, comments included, and your keywords are matched against it.
Why it matters
Reddit's own site-wide search only covers posts. Most buying signals — "what are you all using for this?" — live in the replies. Without comment coverage those never reach you.
How to use it
Nothing to configure. Keyword matches include comment hits automatically, and coverage grows as the corpus does.