When someone asks for a discount it is because they don’t truly see your value.
If you give them a discount then that will forever annoy you (consciously or subconsciously) during the relationship since others are paying more for the same level of service.
You will not want to serve them at your highest level (because that’s not what they were willing to pay for).
And they will always see you as a cost, not an asset, not someone that adds value, but a cost.
It is completely loose, loose.