Pricing varies by plan
“I can do merch because I've connected my Shopify store.”
“Copland Supply is my Shopify merch store where I sell a lot of cool stuff, and many awesome people order multiple things at once.”
12 more creators cited with it, listed below.
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Stripe
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WooCommerce
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Gumroad
also used by 2 of them

Gumroad (Dashboard app)
also used by 1 of them

Omnisend
also used by 1 of them