Bux.to - Less adverts than usual?

Tweet

Has anyone noticed that there has been less adverts than usual on bux.to? Ok, there are 15 on at the moment which is the minimum they advertise but I'd noticed it was slowly increasing to 17 or 18 and even got up to around 22 the other day. Today I saw it an all time low for me (there was only 13 at one point).. anybody imagine the reason for it?