I’ve seen these all over Europe. Some have simple images of the cross flashing, some have windows screensaver esque animations, and some have 3d renders of various things rotating in all sorts of ways. Why is that? Wouldn’t a simple green cross be enough to get the point across, or do they need to be overly verbose? Here’s the full video instead of a gif
This. The big green cross had the purpose of helping people locate open pharmacies, so they already were a sort of advertisement, in a tangential way… when technology allowed for flasher ones, most businesses went for it, because why not.