That's the artist's fault, not Patreon. I've sponsored some artists on Patreon at $1/mo.
I don't think it's a transaction cost issue; Patreon charges my credit card once per month (aggregating multiple $1-3/mo charges into a single charge), and I believe they pay the artists once per month too (aggregating hundreds or thousands of contributions).
I don't think it's a transaction cost issue; Patreon charges my credit card once per month (aggregating multiple $1-3/mo charges into a single charge), and I believe they pay the artists once per month too (aggregating hundreds or thousands of contributions).