The plugin needs verification, which is acceptable so people really buy it. But often, when there are updates, the plugins stops working until it's verified again. So even when you bought it, they disable the functions in the website until you verify it again. And then on their portal, they don't work with a normal login, but a username and token, which you have to reset each time. The plugins works well, but it disabled a website completely once every months and that is unacceptable.