Very good question. This rig was mentioned many times by Clipse and when it is not sold this rig can provide 15 btc income per day and near 500 btc per month according to current network difficulty.

Let's calculate how much he owed in total according to data in two topics (https://bitcointalk.org/index.php?topic=105866.0 and https://bitcointalk.org/index.php?topic=118353.0):

marke74.miner 325
uuidman 320
Inaba 231
MXRider 180
Math Man 173
Morblias 109
Danilo 100
dmcurser 80+
Azelphur 50
btcwalker 40
joyyen 35
ajstar 30
ddd1 28
zapeta 20
roomservice 19
juggalodarkclow 18
KBdigital 16
LoupGaroux 15
John (johnthedong) 12
psilan 5.5
gnpeer 5.5
Xfinity 5
--
Total: 1817 (calculations are done with no interest promises included)

Hope, I didn't miss someone. If it is not so, please correct my calculations.

It is possible to pay out all the money to people listed above in 3-4 months by using the rig power only. Unfortunately, I am sure there are much more people harmed from this scam.