You know it might not be a bad idea on the Channel Descriptions on Roku website to include compatibility of Channels, I kind of agree with the OPer if that is what he means.
Agreed. Even if the website tells you the channel has been added to your Roku account, you won't know if it's compatible with your unit until... Yeah. Sucks.
Yes. Plus, if the user is logged in and on the Channels page of the Website, an extra indicator (highlight, something) if a channel is not compatible with one or more Roku boxes tied to the account.
Roku Ultra (4660), Roku 2 (4210), Roku Stick (3600)
Apple TV (4th gen), Fire TV, TiVo, Chromecast
Roku first, second, & third generation boxes.
Apple TV (2nd, 3rd gen)