Well the difference between twitter and nostr is that with twitter, your account is tied to their servers. If their server is down, or if they delete your little space on their server, you cannot prove that it is you anymore. And all fruits of your interactions will be lost. In the end, for all your participation, you get nothing. Zero. It has no real value. 

Nostr has zaps, which means you can have donations in the most neutral natural market following asset in the world. So even if you would be banned, you still own your identity and you still have the fruits of "labor" and can contitue somewhere else.