Even from this angle it feels incomplete. When I first saw photos, I had no idea what I was looking at. You (in this case) shouldn't be confused by art. Sculptures are 3D art, meaning they can and will be observed from all angles; that needs to be taken into account when creating a sculpture.

The turf very likely has a pad for cushion as well. It'll be a sponge for urine. If it was designed for dogs to pee on, it definitely wouldn't have concrete. Don't do it.

>principles

You mean the law? It's straight up theft.

Just because the owner has taken on a shit load of liability which results in a higher income doesn't make it ok to skim off their business and success.