I would rather target influencers with some big delegations like 50KSP or 100KSP for a month, maybe @theycallmedan can also help on this one, I think he was already planning on doing something like this in the past.

People like Furious Pete (I believe he has like 6 mil followers on legacy social media) briefly came to Steem in 2018 and left but never really mentioned it on its channels.

Masses tend to blindly trust influencers so those are the ones we should incentivize to actively promote Steem, there's really no need for marketing campaigns at that point.