Like rats off a sinking ship
You mis-typify the PPT.x situation. Collectively as a group (six of us) there were discussions around how to make it profitable and provide a good return to investors. One of the things, because of its structure, was that it was quite small compared to the other passthroughs (12k vs 25k for a "trust" account and 150k that Payb.tc was assumed to have). I didn't agree with some of the suggestions being made and thought they would be too far away from what the contracts allowed. I could also see a use for the asset and liked how it runs, so I negotiated with the other five holders to purchase their stakes in the business. Then BS&T closed and things were rather screwed up as I looked after the obligations at the time, and continue to do so.
Other than Chaang, I did not have anyone else ask me to take over their PPTs, but I did have a few people ask if they could operate sub accounts (three people), and the recovery efforts I'm taking aims to have them repaid as well. Nothing particularly complicated.