Did iStock possibly make some sort of recent announcement where they said they would start removing some under performing files from the S+ collection and transferring them into the regular S collection?

I am asking because I noticed I have recently lost a large number of my S+ files. I am assuming they are now regular S files, but I am not exactly sure. I also noticed a small increase in the total number of my GI files. 

Normally the number of S+ files should equal the number of GI files, but I have a divergence here. The number of my S+ files are going down and the number of my GI files are going up. The two totals are vastly different now and I don't quite understand what is possibly happening here.

Any thoughts please?

Yes! To keep tabs, I made a lightbox on 21st March of my S+ files - there were 201. Just now I called up that LB, put the tab to ���, and there are 170.

I don't pretend to understand the criteria for demotion. Some which sold a few times as S+ have been demoted, others which have never sold are still S+.

OTOH, the 673 I put into a Lb marked 'Go to Main', and asked for them to be demoted when they asked for this back in March are all still S.

Does anyone have a clue what goes on there?