DTF is a product that Mike brought to Digital Gateway about 6 years ago. We have moved on to a new product called CORE. One of the major advantages of CORE is that it is easier to share single events. Most customers have the basic version of DTF, the unlimited version is $8,500 and the cost to upgrade is up to $6k.
Rather than fight a battle to get people to upgrade DTF we include an unlimited version of CORE with every install. If you have DTFs currently running we will migrate them over to CORE.
See here for DTF versus our services.