is AdSpyGlass worth using it & is it better than ExoClick and other adnetworks?

I am owner of multiple websites which content is not suitable to use mainstream adnetworks like adsense, media.net or Taboola.

Currently I am using exoclick and not so happy with it. Since I have 60-70% traffic from Tier 1 countries like USA or UK. But still I am getting like 0.03 CPM & 0.01 cpc or even lower sometimes. Also im completely agains pop up ads, so I only use banners and native ads. Still I have tested pop up and the CPM was not so good either.

So I have been researching some adnetworks online. But I am really confused what to use or what to ignore. I have came up with this adnetwork or ad mediation service, AdSpyGlass.

But since I have not heard about this company AdSpyGlass before. I have a little trust issues and doubt about their claim about high CPM and CPC rates.

I heard they have a system to connect other adnetworks at their panel and shows or displays ad by calculating the best CPM. But still I don't know it will work well for banners and native ads. As I will not use pop-up ads to annoy returning visitors.

My question is, is it worth it to use AdSpyGlass ads instead of exoclick ads directly in my other websites?

There are some adnetwork like admaven, adsterra, and propellerads. Are they good enough for TIER 1 country's traffic like USA and others?

I'm curious and looking forward to your suggestions. It will be a great help! Please share your experiences using the adnetworks as well as the payments. Because I already heard some companies does scam often.

Btw I will update all the information I get by using the services I mentioned, if I decided to try them just for testing. I will update those here too. But again I'm looking for your suggestions!