> I really want to like this but they are claiming to charge people for apps that they don't own and are already free.
Selling people collections of software (which you didn’t code yourself, you simply repackaged) on floppy disk or tape was an old-school practice in the Free Software world and generally considered perfectly fair.
Those were disks you installed and ran yourself. This is a hosted product that runs in a (not free) data center. It's perfectly legit to charge for the service of hosting an open source or free app.