Not a good counterexample either. The link to Russian intelligence services may not be proven, but nobody seems to dispute that there were paid influencers? Also that this was not declared anywhere and the money was at best grey in origin?

In events like these it can be useful to operate on the systems thinking maxim and strictly look at who benefited, as this is interesting in itself without entertaining the suggestion that they engaged in anything illegal.

When it comes to social media in politics, I believe the burden of proof is on those who claim a net benfit. Centralization of traditional media is generally regarded as bad for open democracies, and the ultimate owners of almost all social media globally can be counted on one hand with fingers to spare.