While seemingly similar that would be an entirely different concept. What flattr does is enabling small donations for things you already like. One of the nice things with flattr is that the users are already "sold" and have already payed the "fee". If they like what you've done they are going to flattr you, not thinking "is this really worth x". There are a lot of potentially nice things that differs from other revenue models, like making it harder for "link-bait".

I can't really explain entire concept (as I see it) in a good way, you'll have to "get into it" yourself. You also have to keep in mind what the founders are coming from. I don't think it would be a very good fit for Peter Sunde to push for "paywalling" of the Internet with a subscription network.

Finally, the monthly minimum amount is currently 2€.