I suspect the rights just got more expensive. Didn't Just a Minute gave a short TV run too?
It had several TV versions. The BBC did a couple of pilots which didn't go anywhere
Carlton did 2 series of Just a Minute in the 1990s, the first shown in London only and then when they took over Central it had a format change to become London v Midlands. With Tony Slattery and Dale Winton as regular team captains.
Then the BBC did it as a daytime series in 1999 and then a series at tea time in 2012.
The latter was the most authentic version, it was essentially just the radio show on TV. Carlton's version had a few format changes as well as the teams, one round was about an object which of course meant that there was no subject to repeat which I thought was quite a clever idea.
Gary Baldy and Brekkie gave kudos