I was also a bit dissapointed that the monthly option doesn’t exist anymore.
However, the courses I have taken until now are of such a great quality that the yearly plan is totally worth it.
Also, I feel more invested in interacting with the community and I have added a lot of tutorials on my to-do list.
The creators of CGCookie wrote that with the monthly subscription there was an expectation to deliver monthly courses, which would impact the quality of those courses.