4 players in the game : Strike held 50.1% of the shares of AF,...

4 players in the game : Strike held 50.1% of the shares of AF, with the remainder held by D&C Pesca (19.3%), D&C Group (less than 0.01%) and Ausinca (30.6%)

D&C Group holds less than 0.01%, very small and they are not serious in the game.

The counter-bid is a competition between D&C Pesca and Ausinca.

Did Ausinca tell D&C Pesca in advance that Ausinca's bid is US$500 ?

Ausinca is very stupid if they did so. Because if D&C Pesca's bid is $501, then Ausinca's 30.6% of AF is valued only about US$300.

If D&C Pesca's bid is $27.5 millions for SRK's 50% of AF, then Ausinca's 30.6% of AF is valued about US$16 millions.

For Ausinca, it is a game between $300 or $16 millions. Therefore, Ausinca kept tight lip, they pretended to have counter-offer in order to get high bid from D&C Pesca.