I guess I sometimes filter down for the MCU if there seems to be too much other stuff to pick through, but some interesting small fandom stuff can pop up if you just skim? And frankly sometimes I am hungry enough for the trope to read anything where I recognise the names and don't actively dislike the source. Plus some tropes just turn up more in certain fandoms even if they're technically vague, I'd be surprised if TW didn't have any wolf-related tropes of that nature?

But I also don't feel too strongly about specific pairings (again, as long as I don't actively dislike an included character or their fanon characterisations). So sometimes great tropey fics cross my path using this method, that I wouldn't have found because of being gen or about a rare/abstract pairing/grouping I wouldn't have thought to search on. Like you say the A03 output for megafandoms makes it impossible not to miss stuff, so sometimes I find it pays to poke around.