Farcaster Devs

if farcaster team wants to add a token to the protocol, what would that process look like? 

for the sake of debate, let's say it's an egregious fee. can they push through a FIP even if others building on the protocol (eg. base) don't support it?

building first global jackpot @megapot • ex @uniswap • 🟪 #45, FID #1575

this is all theoretical ofc. i don't know enough about FIPs and how similar  or different they are to EIPs, or how voting (if any) works, hoping someone is kind enough to ELI5 for me