I agree with their thinking on this. Why put 2 dumb (or one smart) receiver in the 8-port enclosure when you could just use an 8-port controller. Dumb receivers are interchangeable but you need 2 data cables for 8 ports, smart receivers may only work with some controllers and you have to work out pixel counts per stream. Same thought with 16-port smart receivers, an HE123-style BBB controller isn't that much more and is a lot more versatile.