Would You Pay to Use Twitter?

App.net is a new fee-based, ad-free, realtime social feed—think Twitter, but with a price. But, you see, I already like Twitter. A lot. And I'm pretty comfortable with my whole profile: who I follow, who follows me, etc. I don't quite feel like leaving for something newer, even if it is ad-free. And especially if it comes at a price (which, in this case, it does).

All of which makes me monder: how much is Twitter worth, to the user? How much would I be willing to pay to maintain my existing Twitter account from now on, if, say, I all of a sudden had to?

An entry level membership with App.net is $50/year. That $4/month, $1/week, approx $0.14/day. Let's say I tweet 10 times a day, on average. A penny a tweet seems pretty good! And yet... Even with this seemingly-fair rate, I still loathe the idea of a subscription-based Twitter.

What about you? Would you pay to use Twitter? What's your max?