The difference between this citrus grafting and the 40 stone fruits one is the stone fruits were grafted as branches in the traditional way and then they flowered after a few years. This citrus method is grafting the actual fruits. I didn't think it was possible since the fruits need a supply of nutrients which won't be available until the graft took and the connection became stronger.
I was kind of disappointed that the 40 stone fruits tree image is an artist rendering rather than a real photo. Basically, he thought it's a good idea at the time but didn't realize that those fruits won't flower at the same time in the season or that a few would be really strong and take over. So he ended up not being able to get a good actual photo.
With this citrus grafting method, he can make sure the customers really see a tree with a bunch of fruits growing right on it, maybe while the tree is in a pot too small to naturally have all those fruits by itself. Anyway, i just appreciate it as grafting with a non-conventional part of the plant. It must be pretty tough to make a living. All the other nurseries are probably doing the same thing, so you need to have trees with 100 fruits if the competition trees have 99 fruits. It reminds me of a South Park episode where they had to stay in the forest in WOW to keep killing midgets to build up experience points before they are ready to take on the boss. These people are master grafters.