I don't think Aeria will lose anything by adding the option to sell ore and gems at broker, some ppl who buy gems//ore with AP will sell them for gold just like some other items we see for 5k-10k gold...
If one needs to get his gear crafting higher this will help a lot, unless Aeria remove the need of ore for gear bellow +1, this way we can make the skill level higher and not just use 30-50 ores for nothing till we finally manage to get what we want...
I doubt that they're gonna do anything about it....
In the worst case Scenario some ppl after playing the game a bit will leave it and wait for private server like in many other games and in true if enough people are gathered for it and post requests in the private servers coders forums, someone may code a server files....