There are always alternatives, you just have to look for them. I can't say anything from personal experience, but I see that faucets are full of banners of different ad networks - which means that there is still profit for both parties. However, the most important thing is to ensure quality traffic, and this in turn requires some other things like SEO.
I believe you will find useful information in the next article ->
20+ Best Crypto Advertising Networks For Publishers in 2021