Hello,
to start with, I have to say that I really enjoy this game being monthly subscription-fee free and I’m thankful for that. Honestly, I’ve never played and enjoyed any game as much as GW2. This is the reason why I want to support the devs and keep the game alive by buying Gems. Now, here comes the question:
Do the Devs get more money if I buy Gems in-game or via an e-shop? Can somebody please explain to me how this works? Beacause the price/gem is pretty much the same either on BLTC or an e-shop and it seems to me that buying them via e-shop must be less profitable for ANet. But if I’m wrong, please, feel free to correct me 
P.S.: Sorry if my English wasn't good. But I hope you understood what I was talking about