I think that's just what he's capable of doing via twitter's api. He's stated, though, he's only going to have others follow as the guidelines suggested and not post tweets on your behalf.

Lanyrd is suffering from this misconception as well. Twitter recently updated the copy on their OAuth sign-in flow to specifically list the abilities that an application would have. Unfortunately, since they don't provide finely grained permissions it isn't actually possible to request just the write permissions your app needs. This leaves users thinking that our app will post tweets on their behalf, when we're actually just asking for write access so we can provide a "follow" button on our site.

I don't see how to select a finer grain of control over what Crowdwoo needs, via Twitter's site, though. I've selected Read & Write access, because I need to be able to follow the winners. If there is a way to de-select the ability to post tweets and read timeline then I'd gladly do that. I'll continue to inspect the Twitter docs.