Trump3t queries a total of 100 posts and usually finds somewhere around 15 or so that are not self-voted ( a sad thing in and of itself). If there was a 'do not share' attribute on posts, it would be a cinch but it is not the case I'm afraid.
The problem is that we want to get authors rewards prior to payout so time is of the essence. The overhead introduced from having to stop and request permission would essentially kill the efficacy of the what the project aims to do for Steemians.
There is no intention of cashing out on Trump3t. Rest assured, we plan to use any and all rewards to power up and further support non-self voters.