Supernatural - budget killed because of 5-year plan?

I thought the soundtracks changed because they didn't want to repeat the same songs over and over--they used some really good songs early on, and maybe to some the soundtracks have gotten worse, but I personally think they're still pretty good. Anyway, I think the CW didn't give them as big of a budget as, say, Gossip Girl because Supernatural isn't as mainstream. Gossip Girl is trendy, so they want to put their money in the popular show right now. Supernatural has proved that it can stick around no matter what, so it doesn't need a huge budget. Unfortunately being a quality show doesn't always mean getting the credit and attention you deserve. I don't think the 5 year plan had anything to do with it, because I never knew about it until recently. Also, they're keeping it for another season, so they obviously know it's a successfuly show.