It's not a one hell of an important issue, but kinda'o strange. From time to time I waste an hour or more checking out usage of my shots using google image search (to make this easy I use the plugin that creates a clickable camera icon on images). Whenever I have done this I got plenty of results even for average sellers, a ton for the best sellers. Nowadays, almost nothing. Even bestsellers that get 10+ downloads/day get almost no/no results outside of just the stock site itself. Anyone with similar experience?

im also a buyer and a lot of photos i buy i never use

As I wrote, these photos were already in use, often hundreds of places. Now google doesn't find them anywhere anymore, although they are still up on the places I already bookmarked, for example.