I just think its sad that green tree pythons are so expensive and people are wasting good animals that could be breeding "pure" gtps and bringing the price down so they are more accessable to everyone in the hobby, they are beautiful animals and like fay said they are perfect, don't waste clutches on filth its not worth it. Nobody got in to this hobby to make money at the start we all just love reptiles and somewhere along the line money and pride got in the way of what we all love.
If you were to look at the ratio of GTP sold domestically that are used to breed carpondros compared to pure GTP there would be an overwhelming population breeding pures compared to maybe a total of <5 snakes if that domestically for carpondros, not nearly enough to lower the demand anyway, I'm yet to hear of anyone in australia actually breeding these. So yeah I don't really think that's an issue.
I also doubt that carpondros would be a viable source of income due to the amount ratio of viable offspring and the fact that they can't breed which just like andy said puts them in the same class as mules and as they are very much two different species creating a hybrid.
As for saying they are perfect, I'd go with that except there are people line breeding animals to create yellow GTP that stay more yellow as they mature and I don't see much difference. Either it's perfect and leave it OR they are gorgeous gems that shine more brilliantly with some polishing.
Anyway that's purely objective as if your filth comment but I'd personally love to snap my fingers and have this guy in my collection.
Not for breeding and to make money as they can't easily, just out of love for the beauty of the animal like you were suggesting.
http://moreliatrophyclub.com/uploads/MS-08-bluegarden.jpg