If you refer someone with your link, who then signs up and purchases one of your gigs (because why refer them otherwise??) There is no compensation as far as I can tell. Am I wrong?
Please see the second drop-down under the General/Miscellaneous header. https://sellers.fiverr.com/en/article/seller-faqs
There’s also this: https://sellers.fiverr.com/en/article/bringing-your-own-business
It’s usual to have someone new to fiverr see your link and then purchase your gig. The reward is that you made a sale.