I think that if you do not receive a block that a central person should be contacted and the negligent person be taken off the swap list..that cperson can join back later etc. I am not getting about a third of my blocks yet I am making all of them. Maybe have the blocks due by the 25th of the month and then there 5 days to delete the non doers for the next month. I am seriously thinking of quiting this particular swap. I will work with anyone and life happens but I need some communication. IMHO