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Almost all WordPress premium plugins.

• codegeek 4y ago
  Good point. Any web application examples ? I mean something that can be fully hosted by you as a web app.
  • i0nutzb 4y ago
    I think GitLab somehow acts like this: they have a fully open source product, that you could host yourself for free, then you have a lot of extra functionality that works only for paying users. (tho I'm not sure how that works, if you have access to the code or not etc)