Yes, I have always wondered about people who dedicate money to have the name of a loved one on a siddur. Pocket size? Another name, middle size with English instructions? Another name. The printing company is going to print it and make a profit; no matter what, all the donors are doing is giving the printer more money.
This is not like those who donate money to artscroll in order for them to research and produce seforim that otherwise would not be printed. For example, if Artscroll would charge the true cost of what it takes to produce one volume of a translated Yerushalmi, they would never sell a single copy. The donors in those cases are actually being marbitz Torah in a real way. But a siddur that the company already has? Nisht