Just want to point out that using the regular black hole formula, and the figure of 516,608 solar masses, the formula spits out ~335,304,040. However, most objects were believed to be increased by about 20% in value for 2.0, and they were double before that when they "buffed" exploration payouts.
335304040 / 1.2 / 2.0 =~ 139,710,000 - that's 139MCr.
Interesting to know if Sag A* showed up as a black hole back then, or was still showing as a super massive black hole but had the same value for k as normal black holes. Based on CMDR Sapporo's value for post 2.0, the value of k for a super massive black hole is ~80.565. Shame there's not another one out there to verify this
I agree it was worth 139M for the first discoverer back then, and also happy it was lowered afterwards.