How many copies did Hats Are Not Allowed sell?

984 to 2k copies, based on its 41 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Hats Are Not Allowed make?

Hats Are Not Allowed is free to play, so there is no copy-sales revenue to estimate.

A labeled estimate from the public review count (adjusted for release year), not exact sales. Owner data cross-checked with SteamSpy.

We don't have enough similar games to place Hats Are Not Allowed in its genre yet, so these are its own numbers, not a genre read.

Sizing up your own game? See what its genre can realistically do before you build it.