Well in my opinion.

Typical gambling reference “anything of value,” which is always held to include money, but can include a lot of other things as well. As long as you're risking something that can be taken away from you in hopes that you be able to get something of a higher value

In your case, I think you're not gambling because you're not wagering anything in anticipation of your chances at winning. I'm glad to hear that something like that exists though. We better check it out when we have a chance.