Why not mouth off on social media? Yes, it draws attention. But it also adds legitimacy to the operation if he is not an individual. If a PR firm is making edits to Wikipedia, they get heavily frowned on. If it appears that an individual is doing it, especially one with a long history of good edits, they will be defended.
I don't have a particularly conspiratorial mind and I prefer coincidence until conspiracy becomes the simpler explanation. Just so it's clear we're not entering the unfundable fantasy realm, PR firms can easily afford a competitive salary for a Wikipedia editor just from one or two clients. As can think-tanks.
I can see how I'd set up and scale up such an operation. I'd keep the one editor to one account for reasons above. I'd probably have them be more like a newspaper editor -- they keep a consistent style across the edits. I'd offload the real work to researchers who dig up sources and to write the bits they want inserted and removed.
Look at the first edits by this account: they're on Jazz musicians and politics, and the political stuff isn't too biased. Eventually the cover of Jazz edits decreases. Maybe he started out as a Wikipedia editor and enjoyed writing so got picked up by one of the many many think-tanks that pay journalism money for advancing what will make their sponsors money. Maybe he's an internet sock-puppet. Snowden revealed that the UK has a unit that engages in such activities. [0]
This very site has not been immune from individuals who work for a very-well-funded, highly-litigious, politically-motivated organization posting op-eds that masquerade as thought-provoking articles. Sometimes they make the front page.
It so happens that one of the few handles that only post articles from there are paid to do so and have re-used a handle that as far as I could tell was only used to ask questions about lipstick on Reddit. It was also her real name and she was confirmed as head of social media at the organisation. This was easy to catch, because the only stuff they posted was from one domain.
Perhaps this is an individual living off passive income with a lot of time on their hands and nothing more they want to do. But perhaps this is somebody being funded for doing what they do.
I am reminded of Poul-Henning Kamp's talk "Operation Orchestra" at Fosdem 2014, in which he humorously outlines how entrenched interests could invade or could have invaded open source [1]
[0] https://theintercept.com/2015/06/22/controversial-gchq-unit-...
[1] https://www.youtube.com/watch?v=fwcl17Q0bpk