Well, the card says just Africa 2010, not South Africa 2010, to avoid the world cup copyright.
But the ProYo logo has the MR symbol for Marca Registrada and the distributor listed on the back is the same as on other Premier cards I got. So it is safe to assume that they own the ProYo copyright in Mexico. And there is no question that the name is not a coincidence as they use the full "World Team Proyo" wording. Now the question is if at one time they distributed or manufactured for Playmaxx or if they just highjacked the name outright.
I was very happy to find this vintage Premier Junior on the card:
In spite of its name, it is a little bigger than the standard Mexican top. It has no tabs: the body and cap are glued together. The opaque plastic seems to be of lower quality than current tops. But I was told that at one time it was a favorite of Gus. It required some modding: he hit it on the side to break the seal and separate the body and cap, so he could balance it before gluing it back together!
There are some designs that are a favorite in Mexico and each brand seems to have its own version, such as the Diamante. Another one is the Cobra, only that Premier calls it Gótico: