Facebook makes maybe about 30USD a year from any given profile:
> https://www.popularmechanics.com/technology/security/a212721...
Being relatively optimistic about Twitter's size, and assuming they're just fantastic at it, Twitter might make what, half of that? So for 3$ a month you need about half of the userbase to be on board for data munging to no longer make sense as a business model.
I do wonder how high that mark is though, every SAAS I've worked with has been pay-to-use from the start, so this is not a metric I'm familiar with.
