I have 800 domains that I am currently hosting on 100 hosts and am using them as a link network for my own needs (blackhat of course). IP/subnet diversity is great. However I want to reduce the costs. Right now on average I pay $7k/year for all those hosting accounts. So I was thinking why not just move everything to 1 or 2 "SEO hosts" that claims to have IPs on different c-classes, which would cost me $1-2k/year. Now the first thing that comes to my mind is, how does Google see this? How do these hosts take care of subnet diversity if at all? What do you think I should do?