"Without the plugin, you will not be able to unencrypt the file. After the file is unencrypted, what you can and can’t do with the file will be controlled based on the permissions granted by the owner."

Content protection has been attempted for decades now. See IBM's Cryptolope software initiative (late 1990s ?), which has gone somewhere who knows where.

Rocketship Software's PzDB, which is sold here at Renderosity, uses a Phone Home device. No internet connection, no function, even with license purchased.

It costs money to content creators to have this extra protection of their virtual goods. They'll have to think about the cost-performance matrix and the impact on their bottom line in their accounts books. Some of their legitimate customers won't want the hassle, which is meaningful only for the content creator.

I note that some content creators (not at Renderosity) intentionally omit or impair their content, wait for their customers to make a complaint, then send them the fix (which had already been prepared in advance). That seems a partial solution, but does not prevent onward piracy once the content has been fixed.

It's true that it is a pain in the rear end to have one's creations pirated, and in some cases, be unable to do anything about it. There also needs to be a reasonable "friendliness" toward bona fide buyers, who shouldn't need additional layers of complexity to get and use the content they buy. Best Wishes.

Eternal Hobbyist