give us lazy bastards the cliffs notes version.
Moba wants to move more into direct-buy advertising, cutting out the middleman they use now, to increase margin. They don't have enough traffic to do this unilaterally. Era gives them more/better page view & user engagement stats. They believe they can also optimize how Era does ads currently. Moba has an in-house marketing company and a new agency focuses on influencers & advertising. They plan to synergies all their properties to continue to grow rapidly. Moba wants their primary focus to remain on LoL or other popular games as a service because of the longevity those games give Moba's properties.
Companies that go into insane expansion often go out of business because they go too far. With the margins on Moba, however, they likely are going to continue to expand undeterred. Most likely scenario is that Moba gets bought out.
And there's no way in hell Moba actually gives a shit about Era as a community, so the next buyers will most likely make changes to Era if Moba were to leave them as-is.
Regardless, since Moba focuses so much on Riot Games & Blizzard, Era will likely, at some point, be forced to run ads for 'problematic' game companies & licenses. Era will not take kindly to this, as always. Powder keg waiting for that one spark.