Is '10% part of brokerage for the client referred' system going to stay forever at Zerodha? Please elaborate

People treat trading as part-time. I trade full-time and am excited about getting a ton of referrals part-time. But since it is hard work to bring serious traders as referrals, I am very curious to know about timeframe element. If I refer a client, then would 10% of his brokerage cut come to me for life or for a limited period.

And till how much time can I give referrals to Zerodha? Is this scheme of things going to stay till 5 more years. Because I am long in this, neck down deep, though a part-time thing it is.