The market is all about the cash.
If you want to see more re-releases, seek out a local revival theater and visit regularly. Tell others to do the same. Request your favorite flicks from the theater manager. Only a groundswell can get a trend like this off the ground.
In LA we have the Grindhouse Film Fest every second Tuesday of the month. Two classic, grindhouse horrors back-to-back with exploitatiuon trailers, a raffle and special guests.
Last week I saw Mausoleum and Demons!
http://www.myspace.com/grindhouse