It's rather presumptuous of you to tell me what I paid for.
No it's not. I know for a fact that you didn't pay for betas, because BRL at no time were charging for them. It's really pretty simple. The BlitzMax info page said it was available for Mac and the purchase button lead to a page on ShareIt saying you are buying the Mac version. Then when you paid, you were sent the link to download the Mac version. I know this, because that is the procedure I went through and there were no alternatives.
The fact that you don't own a Mac doesn't disqualify any of that. I don't own a Mac either, but I was at least careful enough to know what I was purchasing before I did so. I had ulterior motives.
Unless you managed to find some dodgy 3rd party saler somewhere, but I find that extremely unlikely, not only because BRL aren't really big enough for weird dodgy business to notice them, but also because you've been here long enough to know how BRL market their gear.
Neither you or I can know for certain whether it was the intention that people would part with their money for the betas
Well, I know that some people intended to pay for the betas, I guess you were one of them, but of course since they weren't for sale they were obviously mistaken.