Picking up on these excellent points, I would first observe that with the changing landscape and the impact of influencers, revisiting the utility of such things as a ban on formal political advertising or electioneering is also required, simply because these sorts of rules are not evenly applied against the most consequential actors in this space today.
Finally, I'd add that another way to begin to get at this problem is actually via the foreign influence transparency registry. I understand that this is principally a tool to control or understand formal state lobbying, but it could also be applied in some instances when there are particular influencers in the space who are clearly advancing a foreign state agenda.