This one has a simple answer: usually no. Ghostwriters are well aware that they aren't getting credit for the writing they produce. Part of their contract is that they sell the rights to the content. Once those rights transfer, the company owns the content, and the writer is compensated with money. The lack of credit is why you can pay a writer less money if you hire them to write publicly for your blog. Public recognition is valuable, and they can work for a lower fee in exchange for that credit, which lets them build up a reputation and work with more people down the road.