Just try it. for what it offers, $50 is a steal. my only caveat would be to make sure you're dedicated enough to commit the time. I'm putting in around 1hr minimum a day at the moment with weekends plugging in an entire afternoon.
That said, I think it's also important to be able to learn from books, which is a useful skill in my opinion.
See mathacademy.com/courses
I’ll make a note to check back in November for those discrete and abstract algebra courses.
> 30-Day Money Back Guarantee. We're so confident that Math Academy will help you or your child master advanced math concepts faster than any other method on the planet that if you find it doesn't suit your needs within the first month, we will refund your payment. There are no long term contracts, no additional textbooks to buy, and you may cancel your membership at anytime in the future.
If you'd like to know more info about this, I went into depth in a StackExchange answer that blew up on HN a couple months ago: https://news.ycombinator.com/item?id=40348986
Yes, I know many companies operate in this way - and I perfectly understand their choice.
I admire these companies. They know they have excellent products and the user can get back to them anytime they want. I support them and give them positive reviews. But they are rare - most use the old bag of trick to "increase conversions" whereas they just cause a lot of frustration (and increased support cost).
But you're right that a free trial would produce more sign-ups and conversions, potentially enough to offset the additional support costs once we're in a better position to handle them (or once the product is better at preventing the need for them). Definitely something to think about in the future.