I found this website Xaliz Custom Clothing. They have a referral program that pays 10-50% commission on any item someone buys with your referral signup.
They have a variety of different items or categories to choose from.
The best sellers for me are the Woman's Leggings.
Btw I just share the items on Facebook, Instagram to get some sales.
You can even ask the admin to add your own design and get even more commission per sale.
They manually accept the referrers and do payouts everyday via paypal even if you only made $1.
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