There is no difference in RTP, house edge, or your winnings between real-money games and the demo mode. What tests can't be run with free money and requires real money?
that's what I usually do but sometimes there's no free demo on some casinos.
So maybe if you want to try those games or anything then best option as you said is to deposit a small amount and play.
it's understandable and I'm not complaining about the faucet. Yes, that's what i'm doing trying to deposit a small amount and if I do like it then why not deposit some good amount.