Unfortunate, I wish I could have taken you as a fellow, as you could have kept your day job and trained on an OT budget like the four of us in the NIH postdoc at the time. We thought we were crazy back then, but it turned out to be awesome and still better than residencies.
Except Nuclear. Nuclear is allowed full funding for the entirety of the program as the entire point of the BPS was for that program to start. And CMS GME DGME funding was only in the last 12 years or so (~2010). Before then, it was based on staffing/internal funding.
PGY2 funding is usually through the indirects (GME IME) even now, even justifying service expansions.
And, some programs actually expanded specifically for that reason in terms of staffing. That's gone away to a large extent, but there are vestigial elements particularly in non-academic health center situations.