There are some ways to earn money without paicing bets and I would like to talk about some of them.
First and the main one is the affiliate/referal programas, this way by sharing your affiliate link you will get some incom from the users bets, isn't easy to get good affiliate (users who bet a lot) but with one high roller you could make a descent amount.
The second one is the VIP programas, like the one that stake offers, you need to bet to grow your account, but once you have a good VIP level you will get a weekly and monthly prizes, It will be better if you bet that month but even without betting you will get something each week/month.
First, for most known way to make an income from betting, is the new trend lately, where many influencers are sharing football predictions and knowledge with their affiliation links to casinos, where they make a benefit from new joiners and take a percentage from those players’ deposits.
Second, most VIP programs are requiring a minimum amount of a deposit in order to get a rakeback bonus, from what I have seen and all the crypto casinos which are famous and known, they don’t offer any free weekly or monthly bonuses without doing anything even that achieving VIP statu takes significant wagering amounts.
Overall, I believe the best way or stable income you can get from gambling is through working with the casino industry as an agent, chat support, moderator, marketing… etc