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.
You will get a lot if you are also an expert in SEO, because usually you will use a website and if you are an expert in SEO you will be able to get traffic to your website so that the opportunity to get new users who register through your affiliate is greater.
I have tried this when crypto casinos or the crypto world were not as busy as this, and got a few tens of dollars but gamblers usually play at many casinos so if you don't get a high roller the income is also small, and now the competition is very tight and even difficult without SEO skills.
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.
You will probably spend more to build an account to become a VIP member than you would spend money to build a website to spread affiliates, and as far as I know you still have to spend money to get bonuses as VIP member.