If you come across a couple of names with similar keywords that are expiring that show the same name in the WhoIS, that’s an indication that the particular person or company might be dropping a bunch of names in that vertical. Because people tend to go on registration “sprees” and reg a bunch of names all at the same time, the dates will be within a few days of each other. I’ve noticed this a lot when doing manual searching and on marketplaces, when it’s clear the company has made a conscious decision not to renew the names for whatever reason, and in addition to the 1-2 names you stumble across, it turns out they’re dropping dozens or more (which you can then search for).
