I’ve seen a bunch of threads about SSL For Free users hitting rate limits. I tested the site myself, and it seems to get caught in a reload loop, where each reload creates a new account, eventually hitting the rate limit.
I suspect this may be a bug in SSL For Free triggered by our rollout of ACME v2 - Scheduled removal of ID from account objects on Thursday. We’re going to revert that change temporarily. I’ve also emailed SSL For Free informing them of the problem and requesting a fix.