I ran into this exact same thing, missed the notice on the trial download page completely. Mostly because I was downloading a trial and didn’t think there’d be such an absurd restriction on a trial.
Frankly, I find the idea of requiring a customer to pay money (even if not to ‘you’) to even try your software kind of disgusting. Any interest I had in this product is pretty much gone, even if the software is really good. I’ll be looking to your competitors instead.
Just wanted to chime that in for posterity.