While cool, this is only valid for the first 12 months of an AWS account.

I've seen people suggest this a lot when someone is asking for hosting advice. Do people just make new accounts every year or something?

Yes, that's what I do and it's pretty much encouraged when I asked AWS if it was allowed.

I've been doing that every year since 2007! You can even use the same credit card information.

I dunno, I've never done that, too much of a pain :/