Best practice for plugins which are not hosted on wordpress.org is to hook into the wordpress update workflow, and do the version check request at that time. This means that updates are being checked only when core decides that it is time to check, which usually happens at an admin page load once every 7 … Read more
You can use variations to set the different prices for the various licences, but that’s a lot of duplication as you’d need to enter the prices and attach the same download file to each variation manually. A better option would be to use the Product Addons plugin, which will allow you to attach any number … Read more
best way to handle subscriptions with a licence?
How come W3TC is allowed to host premium code in the WordPress repo?
Understanding the WPBakery License
GPL prohibits restricting the code in any way. You can restrict the support or non GPL parts of the plugin (images/css) to a single domain but you can’t restrict the GPL code to a single domain. Q&A: WORDPRESS & GPL MATT MULLENWEG’s response to the same question:
You can use this software for free only for no-profit projects. This restriction is not compatible with the GPL which says: This License explicitly affirms your unlimited permission to run the unmodified Program. Either ask the author to put the code under a GPL compatible license, or remove that dependency from your code.
The only 100% way to get a paid subscription kind of service working is to move part of the functionality to an external server which is under your control and manage payment, expiry, etc there. When the code is not under your control you can not limit its use, this is a very basic life … Read more
This is a legal and business question and not a technical one, but since you found an angle that is slightly relevant to plugin development, here comes an answer. Copyright law is complex and while in many places it is basically the same, there are still differences between different countries and therefor there is no … Read more
That plugin is licensed under the GPL (GNU General Public License), so you can modify it as you please. You can even redistribute your modified version, as long as you do so under the GPL and adhere to its requirements. That said, even if it wasn’t, I believe you would be allowed to add CSS, … Read more