They *never* confirmed any sale ouside the OS4 community and the website is 100% OS4-o-centric. Unless they confirm that they sold serious numbers of the Sam boards outside Amigaland I *highly doubt* they did.
They may target that market, but I don't see them selling outside Amigaland. If they were successful, they would communicating this (no, they don't need to disclose names, but usually start ups are happy to announce successes). Denx GmbH, which are listed on the Acube site as partner, don't list Acube products on their hardware page.
IMHO it is a mythst or probably wishful thinking that Sams are sold to the embedded market. At least not in serious quantities.
On their homepage and software page, sure. On their hardware page they don't mention OS4. In their user manuals they never mention OS4. The Flex seems to be the only exception - it's clearly tied to the OS4 market.
Look at the generic wording for the SAM440 & 460 boards:
"The Sam460ex is made both for embedded and consumer markets. It can be adapted to different needs. "..." How can the operating system be loaded? It is possible to load the operating system from a SATA harddisk, a CDROM connected on SATA, a USB key, a SD card or from the network."
How do you explain the EyeMotion?
Also keep in mind, the SAM440 used to be on it's own domain. Acube could have easily pointed potential embedded customers to that domain without ever having to explain why OS4 is so prominent on the Acube home page. That domain is now deprecated, but you can still find the links to it via Google (SAM440.com).
As for not announcing their customers, maybe they have the same kind of clients as whoever supplies the CPU to A-eon.