It is much bigger. 10x-100x

It simply got a lot of MSM coverage at the time Elon bought Twitter. The herd followed. And yes, likely because of a bigger audience.

I think it just comes down to simple norm user onboard, and it looks a lot like twitter did, and when they get there the users are more diverse. We need nostr clients onboarding on interest rather than just recommending bitcoin/nostr folks