I also asked the question, if it would not be a concern of my host. While waiting for them to answer my support ticket, mrgoldy helped me, so every file made or hosting there is an automatic cache purge.
By cons I have a question about this shop. I just did another test. I have a file to download at 1200 points, and I was at 200 points, is it normal that even if I do not have enough point, I can buy the item and be in the negative ? Because I have the impression that there is no verification at the level of the sum. So for the test I am at -1000 points