Now, from what I remember, this used to be a kind of gray zone. But now it's pretty official:
𝗡𝗼𝘁𝗲: Self-referrals will not work since they are prohibited.
𝗡𝗼𝘁𝗲: you will can use your referral link, you'll see your face on the page, but after you create the group with that link, you will not see that referral in your referral panel, and you won't actually get the payout.