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To be honest.
For (Stake) unless you are a streamer + with unique code link promotion, you will success. Without the contract/deal from (stake) is hard because the stake is a typical casino who are not really offering some freebies for the public.
So, basically too gain some attractive at least you need some deal with them to created a unique promotion with your own link like free 25$ with reload something like that.
The problem is that it is not easy to get such a deal imo, because maybe there is at least a requirement from Stake for affiliate to get the deal. I've heard/read such offer (reload bonus) on registration by using referral link on review sites, so maybe Stake will ask where we will spread our referral link. If we have review site with good traffic, maybe we can get such a deal or maybe if we have a social media accounts with decent number of followers, we will also get the chance to get the deal.