A dose of common sense works here: As far as the relaunch goes, they're canceling it, which they wouldn't be doing if it was making them money, so it's probably pretty low as far as sales figures go. Mostly just old weridos like RAFians who are buying copies just to support the series.
As for over all: Again, common sense. The series as a whole launched a toy line, video games, and a Tv show on a major children's network. That makes it likely that millions upon millions of copies were sold. It'd have to have been so, in order to get companies to do things like tv shows, ect.