Continuing on per Buranchi's request, the Twitter account belongs to a guy calling himself "Nakaji" and says he worked as an editor for Jump from 2004-2017, and then on Jump plus since 2017. He says he's worked with the following series (many I'm not aware of, sorry if I get the titles "wrong": Blue Flag, Maiden Empire, Amnesia Battery, Lycopene the Tomatoy Poodle, and Torture Princess Time, as well as the official Gintama app.
The second link was to a series of tweets that actually lead up to it, and it does change the context quite a bit. I hate that Twitter puts everything backwards. Here's the whole thing:
Which now brings us back to the original tweet, which I'mma edit a bit to account for knowing the context better:
So out of context, the first tweet made it sound like "man, Shounen Jump doesn't make much from digital sales", but in context it's more of a "damn, Shounen Jump artists don't even rely on digital sales, and look how hard we're going to have to work until Jump+ can compete with that!".
And this has been your marketing moment.