I understand that GEB's business model is built on the selling of tokens, and the more, the better form the company's point of view. But from my point of view, I’d appreciate being able to wait and see if the invitation to participate in the experiment is met with enthusiasm and adjust accordingly by buying more token to move people from a « wait-list » of completed, but inaccessible data, to data that I can access by buying just the right amount of tokens. Science education researchers are seldom rich; the approach I just described would be much appreciated. And it would avoid the dreaded « study full » message sent to participants…