As for the rest, it is just a matter of checking funding from inqtel and associated groups
The UK has information warfare agents on Twitter as well [2]
None of this is a disputed topic, back on the 70s with operation mockingbird US intelligence agencies bragged that they had an agent/asset on every important editorial board on the country [3] which all goes back to the church committee
[1] https://medium.com/insurge-intelligence/how-the-cia-made-goo...
[2] www.businessinsider.com/twitter-chief-also-works-for-the-british-armys-information-unit-2019-10
[3] https://schoolhistory.co.uk/notes/operation-mockingbird/