But i always thought GOG’S refund policy is more generous

Not to mention it they had it way before steam ever heard of refunds.

I wonder if people ever homebrew’d it to circumvent it (idk if this is even legal)

People have! Homebrewing it for piracy is definitely not legal, but you can hack it like any other PSP (okay technically you can get original homebrew for it kinda but not really legally). But if you’re a law abiding citizen, you can’t buy new digital games for it.

I think the only non-NSFW/NSFW-adjacent Game GOG gave out was Postal 2

Postal 2 was one of the games in the bundle I mentioned. HuniePop was included IIRC along other games like Fetish Locator. It was given away just after the other two stores caved in.