If you are doing a swap then you must follow the rules. I think they may specify LQS fabric so everyone is getting the same quality of fabric, so the swap is fair to everyone involved. If you are buying for yourself then it is up to you what you buy. I seldom buy "new" fabric, I prefer to use what is already made (being green), so I never enter a swap. It is your choice to enter or not, but you must be willing to abide by the rules.