Has anyone noticed their MinnowBooster payments for bot delegation going down fairly significantly?

I've noticed that my payments I receive from Hive account@minnowbooster for delegating SP to their bot are about half of what they were 9 days ago!

Has anyone else noticed this or is their a provable explanation to why?

Remember to vote for Hive account@bayareacoins as a Steem witness.
(you'll need to type my name in all lower case at the bottom of the list)
https://steemit.com/~witnesses

Play with STEEM/SBD at LuckyGames.co