In my research, I found that the three major alternatives would be:
- Google Adsense For Games
- AppNext
- Ad4Game
I suggest researching more about implementations. Good luck!
[PT-BR]
Em minhas pesquisas, verifiquei que as tres maiores alternativas seriam:
- Google Adsense For Games
- AppNext
- Ad4Game
Sugiro pesquisar mais a respeito sobre implementações. Boa sorte!