Hi Mikhail,
"The Fast Track program offers free online study guides and pre-assessment exams for the JNCIA-Junos, JNCIS-SP, JNCIS-ENT and JNCIS-SEC supporting certification exams."
So I guess you are in luck, you are not missing out on your 50% discount. =).
But, yes, it would be really nice if a Juniper representative could offer some further information on this topic.
Philip