Not sure if it’s my imagination but seems to becoming more prevalent. Especially with players at top clubs in late 20s. Just seeing fellaini leaving United. I guess it’s their last chance for one big pay day.Tbh I’m surprised it hasn’t been more popular till now. But a real trend seems to be emerging. Could end up costing clubs hundreds of millions in re sale value. Even someone like fellaini would probably be £25-30m If under contract. Be interesting to see how may affect things if becomes a growing trend. No idea how clubs can get round it.