My apologies for English being my fourth language and perhaps not picking the most precise word to convey my thoughts.
In a sense it is extortion. There is an app you want to use to, say, get updates on events at a con. But in order to get these updates you have to allow them to post as you and essentially spam your friends, followers or whatever it's called. You don't get to negotiate. You don't get to make suggestions. You either take the deal as the producer has envisioned it, or you can pretty much fuck off.
You want something? You are pressured into getting it one way and one way only, completely at the mercy of whoever made the product. No 'sales' or anything of the like where only the functionality you want is available. No ability to suggest some other form of 'payment', for however much you'd call it 'payment' to let the producer of an app take control of your Twitter account.
I am interested to hear from you, however, since you disagreed so vehemently with my choice of a single word how you will defend this practice as actually being a negotiation. Really, I'm curious.