The thing that struck me more is suggesting that game developers would want to release software on platforms they have no access to. Especially if you are even half serious about being professional and you have consideration for your customers, you'd want to make sure your software works and is tested properly on all target platforms.
That was precisely what struck me too. I would immediately lose respect for a developer who was selling me a game on a platform he didn't even own to compile on. I mean if he can't compile on it, he sure as hell can't test on it, so he's selling me a game which he says works based on what? A few kind beta testers who helped him out? No thanks.
Cross-compilation is a nice gimmick for freeware developers, but not for anyone wanting to be taken seriously. Besides, given BlitzMax's dependencies, it seems extremely improbable.