Well, if your consumer ISP isn't a complete jerk and gives you a /56 then you have 256 separate /64 subnets getting you 2,560 pulls per hour.

If that's not enough, you could tunnel through HE's tunnelbroker and get a /48 which has 65,536 separate subnets for 655,360 pulls per hour.

Though, honestly, for the effort involved you're probably better off just mirroring the images.