I expect that's exactly why you're paying to be a beta tester: they can keep your money and not deliver anything.

The one time I really beta tested a for-profit product, not only did I get it for free, I actually got a rebate on the final product (it was pycharm, and jetbrains gave me a free license for a year, which they got back many times over as I renewed yearly ever since).

Though I guess the early accesses I got for kickstarters were kinda like paying for a beta in a way.

I don't think 'beta tester' is a recognized class in terms of consumer law. You're a customer, a merchant, a manufacturer or a bystander. Besides that for something that costs that kind of money you can simply expect it to work.