Even if we assume the minimum - that all investors chose the 5% per annum option over the course of 4 years - that would have required $11.6m in payouts during DR active period of 2016-2028. 16% of total raised just to "pay the Ponzi"
Worse, assuming many chose the 7% after 5 years, this would have to also be per annum otherwise why would you choose it? Bam now you're at 20m, fully a third of all monies raised. These notes would have come due this year.
I'm wondering if DR didn't service all of the 5% debt because it simply couldn't afford to and these unpaid gains are what got the SEC on their trail.