Using my situation as a proxy, I play in 6 worlds (plus one as a replacement owner). Two of the six have been sitting with no progress for a month. I can ditch the two worlds, move to two worlds that roll over faster, and start over from the bottom with two new teams, but I have history with the old worlds and I am not that keen on starting over. So I am 33% inactive with the product and WIS is getting 33% less of my money.
Fast forward 4 months. To football season. When WIS really can't recruit. If nothing is done to improve the product, my 2 inactive worlds may just get worse, and 2 other worlds may become just as bad. Meaning that I am 66% inactive and WIS is getting 66% less of my money. Being completely inactive is not that far away then.