It's not that complicated, really. HashFast has been doing chip sales for awhile now. There are people who bought chips from HashFast and are making their own boards based on HashFast's reference design, but some are looking for people to mount those chips onto boards for them. It's also not exactly a secret that HashFast has been trying to convert people who have big orders for boards or systems to taking chips. For those people who choose to do that, they need someone to put chips onto boards or someone to sell chips to.