it doesnt make sense to make this project exclusive to be honest. For the attendants, it is something personal and this project obviously can not force the any of the attendants to finish the challange they started, sentence noone to do or pay anything because they couldnt or didnt keep up with the challange.
It is something personal and i can understand the moral behind the expectation of exclusivity of such attendant. It is a challange - a contest with their very selves at a certain point. Such exclusivity brings a necessity of fairness to exclude any attendants from the project immediately who are failed to provide their weekly tracks either.

However, a %100 participation or success of attendants to the project shouldnt be expected. Of course results of such exclusivity is unpredictable however it is highly risky. With a production of 10-15 songs per week, this project would end up as a total failure, a pointless, basic tool to feed a false ego of the attendant, which would also wrong the purpose of the attendant as well. The Attendants failure is getting the concept of the challange, it is not only a challange for theirselves, it is also a challange for them to familiarize their faces and sounds with the followers of this project.

Because this platform is also a stage. Attendants are working hard to upload a good track here, and share it public to provide a high quality music to the 'followers' of this project, while challenging theirselves. Simply, own ego of the attendant would be the wrong point to focus, both for the attendant and the project itself.

Main idea of this platform is - and should be - to offer good music to the followers, creating familiar faces, sounds and artists for the followers on a weekly basis. No matter if someone joined in week 2 or 20...

hopefully this could be an acceptable counter argument for this exclusivity discussion