And they ordered the POS software from two companies - at the same time. When the two companies finished the development, they paid both of them but choosed the better one which is now in production...
They also have full rights to the source code and in-house developers to do small changes.
The hardware is supplied by a different company that also has software on offer. But apparently that is not good enough.
Seems logical that once people have selected what they want to buy you get them out the shop as fast as possible.