I see those on E-Bay and CL all the time. Actually using those old lollipop sign bases for a carousel horse is a good application. It would not be very likely to tip over with all that weight.
I have seen them on small tables as well. I guess I would rather see them survive than end up in the scrap yard! I just wish people would not try to pass them off as some "rare" Coke authorized item.
Tim