Add insurance:

A robot r wants to put derivative d on the market at price p.
The robot is not sure whether the price p is right and wants
to pay an upfront insurance premium that guarantees 
that no money will be lost by r (the insurance robot will pay it)
but a profit can still be made.

d=(T,0.7,)
do you insure it for 0.1? Yes, because i know that you have to pay at most 0.5
Insurance company will deliver raw material. Like using an external
software component.


did not go through:
realistic that players can be targeted.

OLD:

Buy or Re-offer. To make derivatives more attractive, on each turn, a player must buy at least one
derivative offered for sale by other players or re-offer all derivatives for sale by all other players at a lower
price. When a derivative is bought the seller is paid by the buyer the price of the derivative.

NEW:
Buy or Re-offer. To make derivatives more attractive, on each turn, 
a player must do the following for each other player P:
Either (1) buy at least one
derivative offered for sale by that player P or (2) re-offer 
all derivatives for sale by that player P at a lower
price. When a derivative is bought the seller is paid by the buyer the price of the derivative.

Motivation for requirements change:
We want the players to become more engaged.
We want to avoid that a player is being singled out.
With the current rule it is possible that a player becomes starved:
Assume three players PA, PB, PC. PA  and PB only buy from each other and PC
buys from PA or PB but nobody buys from PC. PC will soon die.

With the new rule, PA and PB must buy from PC or reoffer PCs derivatives which 
will lower their price. PC could decide to by them and make a profit because of the lower price.