What if you get off PRO for a short or long time?

Now that I got pro, i can upload larger photos… But what happens if there is a gap between payments? Does it freeze my account (people can't see my photos?) does it delete them? Does it freeze only the larger ones? Cause I might as well keep the smaller ones if I consider I might be a few days late or not be in sl for a couple weeks at the right moment….

Thank you!