spinner_ajSrLong time lurker here, so here is what I look at before signing up anywhere. After getting burned once or twice I stopped trusting the big banners.
I always start with licensing: find the licence number and look it up, and whether they actually accept players from your country. Next come deposits and withdrawals: I want at least one fast e-wallet option, and the withdrawal limits need to be written clearly.
Never judge a site by the bonus alone. Anything above 40x rollover is a red flag for me, and the bonus usually expires in a week or two. A decent independent write-up with the current terms is here [url=https://tdmromania.ro/member.php?action=profile&uid=21945]Gamblezen[/url] and it saved me some time.
I play almost only on my phone, and if there is an app I make sure it comes from the official page. Support matters too: if they answer in a couple of minutes that is a good sign.
That is about it. Only play with money you can afford to lose.