I don't know where this type of post could be published, so please don't be mad if it is misplaced.
A have noticed that some time ago google scholar stop to provide as many links to sites with articles than previously. One year ago when I put request for paper in google , google schollar mostly provide more than 3 "all versions" link, where sometimes full versions of requested article could be found. Now in very few cases more than 3 (and when I click on link appears only 2 ) sites where I can find "my" article, and usually one is citation in ncbi.
Is it only my impression, or maybe i mess with some options in google search options, or maybe You have the same impression that google limit searching results to only some sites (only publisher site)?