Alcor already does something similar, although I assume their motives are different.
Any applicant who is still in the application process after three months from the initial application date will be charged $100 every three months for extended application fees until all membership requirements are satisfied.
Alcor already does something similar, although I assume their motives are different.
(source)
So, if you’re going with Alcor over CI, then you can (in fact, must) commit to something like this when you start the signup process.