"When you see the prizes of the contests, do not forget to consider them as a BONUS.
When someone say : '14 diamonds does not worth spending 1.500.000 mafiacash', it means the players fails to understand the prize...
When, in this example, you give 1.5million to the family, you did not BURN that cash, you did not BUY the diamonds....
You gave them to your family and the family can use the cash to upgrade their buildings!!"

I know this.

Another try to give the clarification is here:
https://staging.busy.org/steemmafia/@shenan/steemmafia-family-challenges-next-series-sensless-task#@shenan/re-steemmafia-re-shenan-re-steemmafia-re-shenan-steemmafia-family-challenges-next-series-sensless-task-20180821t142649223z