Telecoms companies (in which I am including carriers) also often fall within this because they are often envious of adtech companies and want what they have and can theoretically make better guarantees about who somebody is.
Not supporting PWAs isn’t in the same league, but I would also add to that: running a popular messenger, running a popular search engine, and controlling distribution of software on a popular phone platform. Spinning up new laws around terminology designed to have bad PR (“gatekeepers”) is pretty damn arbitrary as far as lawmaking goes.