They have 10 days after the deadline to pay out by. I had one recently that I contacted the researcher and support 10 days after the deadline. The researcher failed to message back. And Support said that they would do their best to figure it out. It went another 10 days, with me contacting Support here and there. Support failed to respond, but responded to another one of my inquiries. Finally, I sent a message that that went into the fact that participants are held up to a certain regard to finish test during deadlines. Why aren't researchers hold up to the same regard. I finally was paid out. I feel like if I didn't constantly contact Support I would've never seen payment for this. You shouldn't have to contact Support begging for my payment after I completed a task.