I myself tried to get referral on some casinos by offering bonuses for signup. It was effective and giving positive results a few years ago. I had gotten some real gamblers as referral on a different casino by using this method, unfortunately they have closed their business. But I haven't gotten the success with this method on Stake. I got only 1 referral who place bets with deposits at Stake occasionally. A few other users only placed some bets with the tips which I send them for creating an account through my affiliate link, then they never made any deposits.