Were you doing the same, or just typing random stuff in the search bar to see what comments popped off?
I'll be entirely honest, that depends on a lot of things in how I pick games.
Tags -> Screenshots -> targeted comment search --> play test
Depending on the game I go back into the thread to read a bit more and I have read up to 500 pages. That entirely depends on the results of the play test though and few games on here have engaged me enough to catch up on the entire thread.
Sometimes I dive for tags that are there but I didn't find, major discussions, etc. What I did here was looking every 20 pages for the time passing to find a few major discussions, targeted search for game content and the usual +three pages per relevant post. But that's all on experience based heuristics to reduce the information from this thread to something manageable, so mistakes in the form of information holes are to be expected.
I find the general tone of the thread and especially the last few pages is most important to my decision how and what I post at all and in general I end up with more of a review, which is a good starting point for discussing the game itself.
But I have a few buttons that make me comment on old ass posts, one of them being medical knowledge and that one in particular has gotten my attention because I studied under a gynecologist. And in regards to the hemochorial placenta, it's something that not a lot of people know, but should, because we've gotten, evolutionary, a hilariously bad deal there.