I like to think of this EGS vs Steam debacle like they are physical stores.
Let's say that SteamMart has the most stores and customers downtown. EGStop opens up and offers some freebies to get people to try their store out. They aren't as convenient and I don't know the store layout as well, but it's a nice option to have. I'm feeling pretty good that my town has so many nice options to go buy games at. Then, EGStop starts bribing game distributors to only put their games in their store. I have a SteamMart gift card from Grandma. I used to be able to buy almost any game at SteamMart, except for a few game companies that opened outlets near the highway. Now I can't buy the game I want with my gift card. Also, I pissed off the EGStop manager when I demanded they refund a game (credit card chargeback). I used to be able to go to another store that treated me better, but now I'm out of luck. I can't buy that game I wanted anywhere.
Origin, Bethesda, and Blizzard outlets have the same problem, but I don't care about their games too much so I guess I just let it slide. Also, they make their own games and I guess it makes sense if they don't want to use the bigger retailers. I can't use my gift card there either and I better not get banned because there goes any chance of playing a sports game. But EGStop is becoming really aggressive and now some of my favorite games are only sold in their stores. I would even go to SteamMart and buy these games if they were a little more expensive, because I have that gift card and it's basically better to get that game for more and use my card. Or I would pay more to SteamMart because I'm banned from EGStop because I did a chargeback and also swore at the manager.
I used to be able to go to SteamMart and look at their huge shelves and find all the newest games. I would have liked if I could go to EGStop and see the same games with some deals because it's a cheaper store to sell games at. But I have a bad feeling about EGStop now bribing all of the game makers and leading to me not really having a choice of stores, but a requirement to go to both if I want all the newest games.
If you imagine Nintendo or Sony selling games only at Target, maybe that makes the situation a little easier to understand. Mutually exclusive store offerings don't lead to direct competition, it leads to having to forgo certain games or begrudgingly start going to the other store even if I would rather not.