No it doesn't weaken the argument. The point is that seems to elude you is that they aren't bribing other devs by offering cash for an exclusivity deal. In the cases you highlight they bought IP outright. Also people seem to forget that Valve released a lot of their games on consoles which aren't open market places.

Anyway this is distraction from the general point I was trying to convey that store specific exclusives doesn't promote competition, it actually retards it.

If Epic had a store and just offered the same games for cheaper. I would be fine with it.

Also everyone keeps pretending that EPIC is this tiny company when nothing could be further from the truth.