My friend, I don't want to come off as a flamer, but your question would be more appropriate 10 years ago!! Fem seeds are offered by damn near all seed banks and pretty much dominate the market. I remember hearing DNA guys talking about how they didn't like fem seeds about 8 or 10 years ago. Well check there products out and you will see something changed in the way they felt. I personally believe it is just a matter of keeping up with what is popular and selling. Myself, have been a closet grower for personal use since 2004. It took me a while to realize what I was doing. Once I did I realize my space only accommodated 1 or 2 plants. Believe me when I say this. Fem seeds are GREAT for small scale micro grows. I have read where Subcool and a few others make their little comments about fems. But let me say this. They work great for us small growers. I don't share my weed much because its for personal. But people who have had my product have said they have not had better. I don't take any credit because I believe it all starts with genetics. Growing weed is not hard for anyone who can follow directions! There is a world of info out here. Like someone said above, " Google is your friend"