I think it is just a consequence of those kinds of communities/people where your singular weird obsessions and inability to make room/time for the lives/needs of significant others drives people away, which when they are out of productive ideas causes them to go 'why not make a dating site, lot of people [aka themselves] are lonely this could work!' not realizing that they are partially lonely because they are in such weird insular groups with weird particular monofocusses. In the case of the Rationalists it is amusing this comes after the pua stuff and that it includes betting (which would drive quite a few people away).

But yes would be very funny if they did. Impressively quick building of the site then as well tbh.