Basically if you post even 2x a week you are getting what is equal to about 7-8 self votes based on the averages we are currently running for those who delegate. If you send steem it's double that as the share costs are based on steem and then double if you delegate.
The reason for this is delegations can be pulled so easily and without warning. This makes running a program a lot more complicated vs own shares where someone sends steem.
If you are interested message me on discord so I can work out the most you would want to buy in any given account to get the highest upvote possible. Also need to calculate the actual share price for each account as they are based on the real value to avoid devaluing current shareholders.