There are other means of revenue
If the toys aren't selling as well, there are other means of showing support like buying the DVDs, buying the episodes off iTunes (speaking as someone who doesn't have cable, this is a godsend), or taking a look at the Thundercats DS game coming up:
As for it being canceled, eh, whatever happens, happens. If buying iTunes episodes and moving it to Saturday and getting better ratings isn't going to stop it from getting canceled, then there's no point worrying over it. As a fan, I'm pleased to get what I can get at this point.
Posted from EW's "Moviegoer's Bill of Rights":
IF you are an advertiser who's hell-bent on making us sit through an insufferably stupid commercial for your product, thus helping to delay the start of the movie by 15 minutes, WE RESERVE THE RIGHT to boycott your product, and to miss no opportunity to explain that we do not, and never will, Wanta Fanta.