I suspect the number of tweets each of those celebrities made that [likely] fell foul of SEC guidelines was one. It's not a difficult thing for the SEC to check

I suspect the number of tweets each of those celebrities made that [likely] fell foul of SEC guidelines was one. It's not a difficult thing for the SEC to check. A 3x fine is no deterrent if your action is easily concealed but promoting services to a public audience, by definition, is not concealed