Let the hive mind of Engadget get that for you.
"I finally got a new laptop with a lone USB 3.0 port. I'm now looking at getting a USB 3.0 hub with a power adapter so I can use both of my USB 3.0 hard drives at faster speeds. I've read lots of horror stories where some hubs either don't come with power adapters -- and as a consequence the portable drives don't work with them properly -- or they are designed poorly which results in USB 2.0 speeds. Or, the hard drives keep getting disconnected. Do your readers have any suggestions or experience using USB 3.0 hubs? Thanks!"
I also agree with the point that a cable company saying they will not support the use of a cable card in a third party devices is a far cry different than if they are saying they will not provide the cablecards at all for a third party device.
They are just covering their back side. What they are saying is we'll give you the cablecard(s), but if anything goes wrong short of maybe sending a truck out to install a new one, we're not going to help you troubleshoot any problem(s).
Adelphia has been telling me this regarding my Linksys router for years.