And SOGCA wants 50% as well… And maybe Terengganu, Kelantan and Kedah want 50% too?
Dateline 2012-02-16:
The Sabah Oil and Gas Contractors Association (Sogca) wants Sabahans to look beyond the 5% oil royalty which the state is currently receiving from Petronas and instead seek at least half of every ringgit that is made from its oil and gas exports.
“We should not be asking for the royalty or the (oil) blocks… that’s secondary. We should be asking that for every ringgit taken from our oil revenue, at least 50 sen or 30 sen be given back to us, either directly or indirectly. That would be much fairer,” said Iskandar Malik, its president.
He also mocked local leaders for believing they had accomplished something important and triumphantly proclaiming to the media as though it was a coup whenever Petronas announced that it was giving some huge projects to Sabah.
Iskandar explained that this is because in one way or other, Petronas would still make its money out of Sabah people.
…

I suggest you read about the special position of Sabah & Sarawak.