I say everyone can join for free and gets one post a day. $8/month plan includes 10 posts a day, and unlimited for $20. While I have no interest in Twitter, I'm told it's quite addictive, so make the first taste free and then reel them in once they're hooked.

It would be great if 99% would stay in the free tier.

I don't think it'd work.

$8 blue check marks :p Not sure that has long term profitability...

I think the statement probably is more like "no one has figured out an easier way to monetize a social network"...

There are no successful subscription-only social networks. It's been tried. It has not worked.

Spacex and Tesla were also first time successful concepts. Elon is used to somehow achieving the impossible.

Elon was not a founder of Tesla though.