Off market- On market transaction charges BOID- DP Charges?

[STOCKORGANICS.COM]

How is Zerodha able to waive off 23.60 / Transaction on every activity from DP?

Is it because you have a self clearing membership ?

Will you please explain in detail. It would be of great value

[NKNK]

ZERODHA SHOULD ACTUALLY SHOW IT IN THE CONTRACT NOTE BUT IT MIGHT INCREASE THE COST OF TRADE VISIBLY TO THE CLIENT