Regarding the "friendslop" games - I don't see an issue, the companies that provide those game with online services will adapt to the new requirements to keep getting money from those game developers.

Regarding the optional multiplayer modes - the developers will probably not use some complex architecture for this, so giving it to the community will not be that hard. Also there are multiplayer games that do support community servers out of the box, so it's not an issue to make a game like this.