Not cheap for sure but it's all for fun! I have done some optimizations to try to get cost as low as possible; the final clustering actually uses Kimi K2 for this reason. More info on https://intheweights.com/about

Because you don't have a privacy policy or anything really, I assume you're harvesting IP addresses and selling matches to the highest bidder.

He stands to make dozens of fractions of a penny doing that! Must be pretty tempting.

There's a nice feature in Brave for sites with obvious privacy implications: right click -> Open link in private window with Tor.