I just tried /support but it didn't work. Could it be because I got the free version of the game??

It's a suggestion, it hasn't been implemented yet, don't worry
/support, /halfsupport, and /nosupport is just a way of showing whether you support the idea or not of this suggestion. (It also helps to give feedback about it too)

I think it's a great idea, it could at least give the app more traffic since people would play it for the titles !

/support

/Support