Valid Purchase Date

So, either a massive coincidence, or something strange is going on..

After putting in a serial that I ensured said ‘Serial Number not valid’ on the coverage checker, I have checked a few days later and it is now saying it has a valid purchase date. Unless a mac has come out of thin air and sold in the last few days, I’m assuming mine has been marked as a valid purchase due to contacting Apple servers or whatever.

Is this a good thing?