BUSD flexi savings 20% offer?

So, last night I was helping a work mate set up his cash position in preparation for a future market bottom and recommended he put his fiat $AUD into $BUSD and try the flexi savings function as it was a passive 10% apy and that atleast it would be doing something while he waits.. When I was taking him through the steps, binance had a "special offer" of 20% for the first 2k BUSD, the APY was doubled for every tier.

I checked my own app and it still said only 10%

What gives? What do u need to do to see the special offer rate? He's had his binance account for over a year like me.