asking rebate/credit from buyer agent

[Rachel Feng]

I know a lot of my friends use agents who can offer some credit/rebate at closings (for house value over $800k). For example, for a house value around $900k, the buyers would be able to get rebate of 1% of the value from their buyer agent at closing. The buyer agent still gets paid for 1-1.5%. I have worked with an agent in the past and would like to continue working with her for purchasing the next house. Is it ok to ask her to extend 1% rebate? Am I advised to not do that, instead of focusing on building a relationship with an agent and make sure she is well paid?