FAN (Facebook audience network) is dead

It seems that FAN (Facebook audience network) has not been working well for some time, they take a long time to validate apps, some do not validate them, others are deleted, in short, it seems that they are no longer interested in compete with Admob. I have a lot of requests (200k daily) to their network that are made when Admob fails but now I have them without monetizing.

In the past I have tried several networks but apart from these two main ones (Admob and FAN), none of them are even close to them in apps (not games, that's what Unity works for).

I tried asking to join the Amazon network and they rejected me (even though we are talking about a white hate app with many quality installs).

Any recommendation?

Thank you very much.

i can help but first i need to know if it apps , spam , semi legal ? i tried many networks since the admob limit problem

Totally legal apps, extra white with no Admob limitation, the problem is that Admob not always cover 100% of request and for this reason I need a secondary option, FAN was very good but now it's almost impossible deal with it.

Thanks