That's not an easy one. Problem being, I don't think those people's objectives overlap with our objectives.
Let me play "Devils Advocate" for a moment....
Consider this, the last time Hive pumped, the 24-hour trading volume was US$969 million. Even if we are generous and round up, that means the ENTIRE 175 million Hive on exchanges would have churned 6-7 times in 24 hours... and considerable fortunes were made (and lost)... with something on the order of 65% of that volume coming from the Upbit exchange.
I don't know how open those speculators (which strikes me as what they are) would be to giving up the potential for 30% gains in a DAY for the opportunity of having their stake locked up for 90 days in order to earn 20-25% curation returns, even if using perfect auto voting.
Not saying there aren't some who might not want to change their ways, but I think it would be a tough challenge.
RE: If you could write a letter to HIVE owners on exchanges, what would you say?