spinner_crSrLong time lurker here, but I figured I would share what I look at before signing up anywhere. After getting burned once or twice I stopped trusting the big banners.
Licence comes first for me: see which authority is listed in the footer, and if your country is on the allowed list. Next come deposits and withdrawals: crypto is a plus but not a must, and the withdrawal limits need to be written clearly.
The welcome offer is where most people get caught. Read the wagering and the max bet rule, and the bonus usually expires in a week or two. A useful overview with bonus rules, app info and payment methods is worth a read here [url=https://www.codesaya.com/u/csa9b60/]wildrobin bonus[/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: a real human reply beats a bot loop.
That is about it. Treat it as entertainment, not income.