Under other circumstances, it would be almost "bait and switch."
Although more accurately, it's changing a deal after the handshake, which, legal or not, sucks.
If they want to use this setup on new customers, fine, but people who have already heavily invested in equipment based on the old deal should be "grandfathered" out of the new requirements.
At least that's what I'd do if I was running that company. Might be a compromise you could talk them into. Bring media.