What are the scripturally-promised benefits of Pind Daan at Gaya?

The Vayu Purana and related texts promise these specific benefits: (1) Liberation of Sapta Pitri — seven generations of paternal ancestors (father, grandfather, great-grandfather, etc.) and an equal number of maternal ancestors, (2) Release from Pitra Dosh — the astrological affliction caused by unsatisfied ancestors, (3) Moksha for ancestors trapped in Preta or Pishacha Yoni, (4) Blessings of progeny and prosperity for the performer’s own family, (5) Spiritual merit equivalent to a thousand ordinary Shraddhas, (6) Removal of “Rina Traya” — the three ancestral debts every Hindu is born with, (7) Absolution for descendants who may have neglected past Shraddhas, (8) Opening of the path to moksha for the performer themselves in future births. These benefits are specific to Gaya and not available to the same degree at other tirthas.