with hot toys, limited means that they won't be making them forever. since none of us work for hot toys, how could anyone gauge the total edition size without an announcement? thing is with hot toys, they will be on sale for what seems forever, then one day they'll be sold out. IE: hawkeye, nick fury, every joker, etc.
you don't want to be caught without one because once they are only available on the secondary market, you won't be able to score one for a reasonable amount. IE: 1st black widow, whiplash, two face, etc. (retailers couldn't give these away. now they are selling for $300-$500)
i've been collecting hot toys for several years now and this has always been the MO. except of course when they announce the edition size from the beginning.