I am surprised more labels aren't doing this. How much is a label spending combating piracy? How many labels have actually prevented an album become available

I am surprised more labels aren't doing this. How much is a label spending combating piracy? How many labels have actually prevented an album become available via bit-torrent? Few albums actually flop because they can be pirated. I think a viable strategy is for the label themselves to upload the album with a message like this. Its going to be pirated anyway. These people aren't going to go to iTunes or buy the CD. Why not just have a simple message which says something like: "If you enjoyed this album please consider making a donation to the artist. The artist will receive 85% of your donation. The other 15% helps cover the cost of production." I mean, its worth a shot isn't it.