1) Networks don`t offer much now.
- Banner: GONE (One channel layout, everyone can have a banner now)
- Thumbnails: Just apply for monetization
- Music: Google
2) Stay with Adsense.
3) Your views (as everyone has said already will drop when the song "Roar" leaves the charts).
4) You will regret getting partnered when you sign that 2 year contract. Then you`ll b***h about "I`m stuck in RPM for 2 freaking years!". Remember, you`re signing a legally binding contract. Once you sign it, you can`t terminate the contract unless you have a no lock-in term.
5) Partner your channel when you get bigger.
RPM is a small network, there`s a difference between Maker Studios and RPM. RPM is a CN under Maker.