I'm getting a significant number of people who get a "Free account" (so they are "guest"). This does not do anything for them, they don't get access to anything by getting that subscription. Which might also be a bad user experience for them.
It would be nice to have the option of removing the option to get a free membership. (I do understand they need a guest account if they want to unlock something, but most guests have an account without having spent anything)
I searched the requests page and I did not see a similar request. Apologies if I missed it. :-)