thanks @sbd.jackpot death followers are followers that not active for over a month on steemit,
and inactive follow are readers that didn't engage with resteemed posts by X account
for the last 50 followers

My formula displaying active followers-> followers that did engage with resteemed posts

but @jga suggested me to look at @andybets is a bot, human or spammer. classification
https://steemit.com/steemdev/@/steem-sincerity-improved-anti-spam-api

and I more thinking to use this algorithm instead, right now I testing.

displaying account SP is a good idea, I was thinking to display the highest follower SP instead
to give more perspective on the highest potential earning you can get if you get upvotes from followers