Some years ago there was a special promo from Lavasoft company ,,Invite 5 friends and get a 1 year free key for Ad- adware Pro,,. I was happy when I saw this promo. Because I wanted to get keys by cheating them in vmware. But I was disappointed when I founded out that it didn't count my installations. I tried to do it in real computer but it counted only 1 installation (there was smth like hardware locking). So, I had to use other computers for installations..... But I didn't have many computers.... I could solve this problem by a special utility which spoofed the hardware id and managed to get about 50 keys. All of them I shared with my friends/forum users