Rick and morty is not a small show by almost any metric. Funko pops also became popular right around the same time and have a massive overlap in fans, so it makes sense. Futurama was not out at the same time for the most part but there is still about a dozen funko pops from it.
Funko can just make tons of unique models really cheaply, and they know fans will buy them to collect like beanie babies, so of course they'll keep churning out different versions of the same characters of one of the most popular nerd cartoons that their own fans love.
There was a lot of undeniable evidence of him being a bad person regardless of the court not being able to prove abuse beyond a reasonable doubt.