I saw you use only Bitmedia ads network. have you tried with anyone else? Also are you limited with crypto ads networks or you are eligible to work with fiat only related? I would try with some more ad networks. Bitmedia is okay, but they are not the most generous payers (based on my experience a few years ago, maybe is now changed). Also, it's questionable how are attractive their advertiser, and whether they can attract clicks.
have you thought to sell ad space directly? Present some of your traffic data you may find someone who wants to place an ad on your site.
If you have solid daily unique traffic, don't forget about affiliate and referral programs. have you tried to collect referrals on another faucet by promoting them on your site?

Don't forget, faucet traffic quality is at a low level. You can't expect a high conversion rate, but constantly and persistently, you can get the result. also, don't overload the page with ads. you will get a counter effect.