According to the Binance team, users who hold 500 BNB or more will receive double the commission (40%) from referring new users to the exchange. The token spiked from $12.9 to $16 in about two hours immediately after the announcement was made public. They further state that the commission rate for all other users will be staying at 20% as per usual.
A strict limit of 200MM BNC will be created, never to be increased. You can use BNB to pay for any fees on the platform, including Exchange fees, Withdrawal fees. This is to continue until half of the BNB, representing 50 million of the total 100 million are totally burned. As a result, BNB should have a stable value and continue to appreciate over time.