Here's one: Google Shopping search or whatever they call it this month. They switched to a all paid version, so only stores that pay Google get featured and the

Here's one: Google Shopping search or whatever they call it this month. They switched to a all paid version, so only stores that pay Google get featured and the price they pay to Google is what decides their placement--regardless of what Google says. If a store that has the best price does not pay Google or does not pay Google enough will not be seen by users.