Roobet doesn't have a welcome bonus. No deposit match. No free spins package. No "100% up to" anything. You sign up, you deposit, and you start playing without any bonus structure attached to your 1st deposit. That's unusual enough that I had to double-check the promotions page to make sure I wasn't missing something. I wasn't.
What Roobet runs instead is a $100,000 Weekly Raffle. Every wager you make earns raffle tickets. 100 winners drawn each week. The more you play, the more tickets you accumulate. It's not a bonus. It's a lottery. And the psychology behind it is different too. A welcome bonus gives you something immediately and asks you to work through wagering requirements. A raffle gives you nothing until the draw happens, but the potential ceiling is much higher. Most people will win nothing. Some will win big.
The homepage shows MMA fighters and a Chelsea FC player. Roobet leans hard into influencer and athlete partnerships. That's where their marketing budget goes instead of welcome bonuses. Whether you find that more or less trustworthy than a 100% match depends on how you feel about celebrity endorsements in gambling.