I think the plugins would stop working because if you have been here for a long time they always use "suspend" when they want to remove a plugin from the store so the plugin license will still working. This have happen to me at least with 1 or 2 plugins.
BUT if they decide remove the plugin totally from the server or close down the domain + server i think the license to that plugin would not work anymore.
This is what i think will happens...it is no safe investment. they should handle this proper the day they decide close they business BUT do WE trust that they will hanlde that proper that time it would happen?
For me my trust is very low fpr they help US that day...sorry to say it but the store is WILD WESTERN with very little rules that protect buyers from bad developers and thinks like this..... ..alot of gamble with BIG money...and one day you can loose it all with no notice
I always said that invest money in any plugins in this store is a BIG risk there is no safe line for things like this happens