Right now, I think it's all conjecture. No one has gotten any definative answer from Hotwire/Connections because they've been closed all weekend. (Not that you can ever get a straight answer from them!). It is known that Florida Orlando Tickets no longer has vouchers to sell and will not be getting them in the future. Also, Connections has removed the child VKLs from their list of available vouchers.
The reasoning is that Disney wants to induce more people to purchase MYW packages with the dining option and that perhaps pulling the vouchers from public sale will do this. Unfortunately for them, it may backfire. More people may decide to eat offsite rather than purchase the packages (with the room at rack rate). In truth, only time will tell.