They don't need much marketing. They were, AFAIK, created by DHL for its own needs. DHL approached companies and universities, offered to pay even for the devel

They don't need much marketing. They were, AFAIK, created by DHL for its own needs. DHL approached companies and universities, offered to pay even for the development, but found nobody willing to build what they wanted. They ended up making it by themselves - this is the company created for this purpose. They already have a customer, they were born with it