Jackson's not said anything about sharing 5k. Snake.
 

Throughout the whole series they have played moral characters and tonight they have show their true colours by taking that 5k. I wonder if Jackson is going to share the 5k like he said he would share the money yesterday...yeah. And now he is crying in the diary room to gain sympathy from his decision.

As they say "Money is the root of all evil"........true colours are shown when money is at stake..