Has anyone used for selling subscriptions for apps? I searched the forum and found nothing.

Yes, I have. But, I did not integrate it with any Xojo endpoints - all my subscription management is handled by some middleware that runs on webservers in PHP. This communicated with the api to get updates for subscriptions. My Xojo apps would use https calls with securesocket to communicate with the php middleware for account validation.

We fired Chargify last year though - they jacked up their pricing (nearly tripled it) so we switched to a plugin for our Magento store that manages subscriptions, and I just adjusted my middleware to receive updates via the Magento api rather than Chargify.

Thanks @Kimball Larsen

Looks like Mark Cuban got a little greedy with this startup. I think I’ll set up a free account and see how it goes, but be cautious.