Interesting to see an art creator based around buying credits.
Do you use Shopify for the order processing?
Do you use Shopify for the order processing?
Do you have to integrate your own payment or do they handle it all for you? Do they collect the money from users and then send it to you once per month? Do they handle the tricky parts like dealing with VAT per country?
Do you need a PayPal account and dabble with their API to set up this type of solution?
Or is a Shopfiy account enough?
However, if you're wanting to sell digital products, it may not be the best option for you. I've had to do a bit of extra work to get it to work for my situation.
Aren't your prints also like digital goods? I would expect you do not print them yourself but forward the image and order data to some whitelabel printing solution?