Is Mattel Dumbing Down Things With Revolution?

It does seem that Fisher-Price after taking the licence off Tomy just don't seem to want to take the product seriously. Even the revolution engines are all but non-existant in the UK unless you get lucky in some stores. Not that I would buy them anyway, but the point is why take the licence then refuse to exploit it?

I suppose if you deliberately make things hard to get when you ship stock you know its all going to sell as people (especially collectors/speculators) will just grab everything they see on a shelf. But is it really a long term sensible/viable way to do business?!?