Is it just me, or is Play Store making it harder to scroll when ads are on-screen?
I normally use the Aurora frontend, but I used Google's app to check something. I couldn't help but notice that when I swiped and then let go, the page would barely move past the point I had let go. It had no momentum whatsoever. As soon as I got past the ads, scrolling was back to normal and the exact same flinging motion would send me down by at least a screen's worth.
Playing devil's advocate here, the old store system I worked for always inserted cross-sellers at each page-break, too. It was just how the underlying code worked, it first loaded a batch of products, checked whether the user was supposed to see them, then figured out cross-sellers for it.
But by nature of that, if you say load 50 products at a time, you end up with those 50 being in the list of returned objects found, followed by the 5 (in our case) ads. So by nature, once someone scrolls to the ads, a short jitter happens as the system loads the next 50 objects for sale (and the next 5 crosssellers).