I haven’t read much about #’s new “subscription” thing (paid, like App Dot Net # tried years back). But by comparing it to ADN, I think I have already stated my view on how likely it is to succeed.

Can they find a way to make it succeed? I’d say yes: add extra “paid only” features. If people care enough about those features, they’ll pay. If paid users lose the “promoted tweets” ads and the algorithmic timelines, some people will likely pay for that, too.