It’s just a demo …

The most important feature “accepting money from the customers” is charged:
By subscription costing $29 a month!!!

And that makes it clearly a demo!

And you don’t see that from the beginning but much later in the process of testing it and having given up personal information, opening account on their site, etc etc etc …

One can get other similar plugins fully operational with almost the monthly payment they ask, and own them forever, and without the hassle … of opening account, giving up personal information, etc … To explain, in order for the plugin to work at all it requires to open an account on their site and go over a lengthy and very tedious process submitting many sensitive personal information, name, location, website, etc, and … a mobile phone number! … otherwise it does NOT work at all, even for basic testing! …

At least, say from the start, it is a demo! Don’t say, no commissions, no costs, no fees, etc, require and store many sensitive personal information and somewhere down this tedious lengthy process one finds out that the plugin is missing most basic operations such as, accepting payments!!! … which, you charge way too much! …