Look for a complaint record, because it is the single most useful thing a player can check before depositing. A site that opened last month has none, so there is nothing to read either way.
Type the brand into AskGamblers or Casino Guru and read the disputes from the past year. What you want is a run of complaints that got resolved. You also want a payout time in the comments that matches the site.
Then two more checks, a minute each. Does the licence number resolve on the regulator's own site, and does the restricted-country list name Georgia? Those three signals tell you more than a launch date ever will.
If you came looking for a big welcome package, that is a fair thing to want. The offers are ranked by real value on the bonus ranking.