[Renaud]

It has. People have rediscovered its importance and some have decided there was an opportunity to cash on it. Like anything else that has some success, it attracts some opportunists.

It shouldn't detract anyone from looking at stoicism though. You can get everything you need from it for free, although a few books and helping the Patreon of a few philosophers who work on making it accessible is still a worthy cause to spend some money on.