I'll throw this back at you, if you think this is correct behavior then, "I feel sorry for you." We may agree that $12 is piddling but what if the membership fee was $25, $50, $100 a year? Would you feel the same way?
I'm not Manoli, but I certainly would feel the same way. Michael and friends own the site. What they do with it is entirely their business (unless they use it to promote heinous acts, like terrorism, for instance).
Whether I subscribe or not is entirely my business.
In my view they have bent over backward to be responsive to issues brought up concerning the monetizing of their site.
As soon as there is a "Donate" button, I will donate something more than the $12 they are asking for, for access to the main site and all the videos. The forum remains free (unless you want to sell something, and that seems to me quite reasonable, too).
I find it somewhat ironic that a vocal minority is taking advantage of it to complain repeatedly about aspects of the monetization of what was previously a free site, but with fairly expensive videos, if you wanted several of them. (If you want all the videos, it is now much less expensive.)
Eric