I would guess google doesn't care for five reasons:
1. There's a documented API to fetch these images, but it's less convenient.
2. These demos make Google look good.
3. There's no potential to squeeze money out of the creators of these demos, because they aren't monetized in any way.
4. Shutting down people who are playing (relatively) harmlessly with their technology would hurt Google's community image.
5. The demos are of no practical use, so if Google breaks compatibility, nobody will care.
So if you look at the costs and benefits, it would be unwise for Google to crack down on this sort of thing. But if you started selling an iOS app that used this, I'd be shocked if they didn't smack you down.
1. There's a documented API to fetch these images, but it's less convenient.
2. These demos make Google look good.
3. There's no potential to squeeze money out of the creators of these demos, because they aren't monetized in any way.
4. Shutting down people who are playing (relatively) harmlessly with their technology would hurt Google's community image.
5. The demos are of no practical use, so if Google breaks compatibility, nobody will care.
So if you look at the costs and benefits, it would be unwise for Google to crack down on this sort of thing. But if you started selling an iOS app that used this, I'd be shocked if they didn't smack you down.