I would like to see a store so i can get my own stall and sell stuff to other players that i do not need they can use. Glimmer i think is the Currency but i think if you look at the Thunderlord progression table you can see that it can be upgraded. So this means equipment will cost a bit of glimmer to upgrade or use. How this would affect a Game Economy and how micro-transactions affect or impact the game will vary. But using the WoW example Burrito used they also have Pets or things you have to use real money and some of them go to charity's. So lets say you wanted to get a Virtual Raspy Stuffed Tiger in your ship it would cost X amount of real money also it might say 10% of this will go to the Bungie Foundation. They are just items that can be added in that really do not affect the gameplay or The Like. What Broke PVP play in WOW was not Microtransactions nor earning points towards gear. It was heirlooms that eliminated the need to have or go get better gear. Instead it helped people power level but you will never have that feeling of chaos as people fought in what gear they had. People in sets did better as they spent the time and effort to go get it. If microtransactions were implemented i would say the gun equipment or armor comes as is.