As defined by Wikipedia "A halfway house is a place to allow convicted criminals to begin the process of reintegration with society, while still providing monitoring and support; this is generally believed to reduce the risk of recidivism or relapse when compared to a release directly into society. "
The gay porn version of it "Just when these young guys think their problems are over, they are just beginning. Young vulnerable guys are violated, abused, and taken advantage of for sex with much older men!"
It's just a fantasy. Some of the guys from the site do (or did) porn for other gay porn sites.
Boys Halfway House is a bareback porn site, mostly POV style of filming.