Why WEREN'T there more Muppet Show on Tour?

[minor muppetz]

This is something I've been wondering about for the last few days, and I don't really expect anyone to know but maybe some do. Back in the 1980s, there were two Muppet Show on Tour shows (and a few Muppet Babies Live shows), and then they stopped. I wonder why they didn't continue with these. Did the two shows (or perhaps just the second one) not sell very well? Could it be a case of the performers being too busy to record voices (though it seems this wasn't an issue with Sesame Street Live, where Jim provided voices in each show until his death and Frank provided voices until Eric Jacobson and David Rudman inherrited his characters)? Could it be that they didn't want to keep doing the variety show format for a live touring show?

It especially doesn't add up when I think about what was said in Jim Henson: The Biography, that The Jim Henson Hour was the first time that the Muppets had truly flopped... With that in mind, TMS on Tour should have succeeded then.