Ethics of free games.

[latinstorm]

So I started playing ogame.org. The interface is crap, and they'll sell you access to a better interface. So I started writing a greasemonkey script to make the interface usable. If I start adding the feature they want you pay for, am I cheating? I've read about the interface, and it sounds like it's actually not as good as the interface I'm building, and is buggy.

So is it cheating for building free versions of the feature they're trying to sell you?