a conservative valuation for others to look at might be five times an annual earning potential of an account.
I have to disagree with that. An older, well established account tends to start growing exponentially. If you factor in other opportunities it's downright priceless :)
Could probably say multiply by the number of years on chain with good standing as well. That would be a very large extra.
It really would, because each year tends to add a lot, both in social capital and account potential.
!PIZZA