Comment by progbits

Valve will refund any Steam purchase if made within 2 weeks and with less than 2 hours play time (see https://store.steampowered.com/steam_refunds/).

Therefore this doesn't really change much when it comes to realization that the game sucks very early on.

I suppose there is some small risk difference between "play 90 minutes for free, then decide to pay" vs "play 120 minutes for full game price, then get it back". But in my experience and from what I've heard over the years the refund policy is reliably honored.