12 Banks were already live on BBPS and platinum card was already giving reward. So addition of more banks won't change anything for Platinum card. Until it has 1% Utility benefit you keep getting it. But imho, in future, it may reduce to max. 500 cashback or even increase to 1000 cashback. Those who are not having any DC with benefits should use normal sbi dc or virtual card for 0.25% or 0.5% in birthday month.