According to ChainCatcher, Solana ecosystem transaction aggregator Jupiter announced that the referral program is now online, and referral fees can be earned by inviting new users to exchange on Jupiter.
Users can set the fees they want to implement (up to 1%) and choose the tokens they want to earn fees from - Jupiter only charges 2.5% of the fees earned.
Referred users can also disconnect the referral at any time and experience Jupiter without fees.