I saw that with Crossover 14.0, Amazon Cloud Player for PC is listed as Silver, but the install still has issues.
For one, it's not listed as a supported application within the actual installer, so I have to choose "Other Application". I thought Silver lever applications would be included.
Also, the installer doesn't recognize that the install was successful. The application itself starts running, but I have to do a Cancel in the Installer, meaning that I have to go through various machinations that I can never quite remember to add Amazon to the list of Installed Applications and to the list of shortcuts in Linux. It it was a one-time install it wouldn't be a big deal, but the application updates quite frequently.
So, either I'm doing something wrong, or it's not quite a Silver level application.