I think, and I went back and forth with someone from Shout about it a while ago, that Maude has moderate music rights issues--four "musical" episodes that would be quite expensive, but the rest of the series is similar to All in the Family and not nearly as music-laden as Sanford and Son. The issue is the projected sales versus the music clearance. They just don't think it's going to be worth it.
And Vahan, you may add me to the list of straight male Maude fans. I draw the line at The Nanny, however. (No idea why different shows appeal to different groups, but a funny story about The Golden Girls. When LOGO, a gay-themed cable channel was starting up, they solicited ideas from the public about what programming to carry. The president of the network said that he couldn't understand why all these people kept asking for The Golden Girls. He added that they couldn't afford it anyway, but he had no idea why so many people suggested a series with no gay-themed content beyond two or three individual episodes. So I'm not the only one who can't answer your question.)