Ebucks Restucturing

I have been a client with FNB for years and have always been on the level 3 rewards system, As of June this year I was downgraded to level 2 and then this month to level 1. So now where I used to qualify for up to 20% discount I now qualify for 5%. I have 3+ personal accounts with them as well as business accounts and frankly I am upset that they can just change your rewards if and when they feel like it even though I have been doing the same things for years. I will now start looking what advantages/rewards other banks can offer me as Im sure other banks will offer me a better deal.