$1.3b to track 100k kids for 7 years. That's about $2k/child/year, which sounds insanely expensive. How can a study cost that much? You could buy each participant an iPad _every_ year and given them $100/month for filling out surveys, or you could hire 1 researcher for every 25 kids, which sounds grossly inefficient -- and you'd still be under $1.3b for 7 years.
Hold on! It says the study never went beyond a small pilot? Where did the $1.3B go?
Also, as has been said, it's not clear if all the allocated money has actually been spent.