I have spent nearly $600 (on an annual commerce plan) and countless hours of my time to set up my shop on SQSP, just to finally be ready to open my shop and find out that NONE of the shipping integrations and apparently also not SQSP shipping labels offer a letter rate for plain, flat, 1 oz envelopes? I am in tears and SO frustrated right now. I offer free shipping and if someone is buying a postcard from me for $2, I'm not going to pay $3.75 to ship it with a package label. There has to be a way to do this other than to type in everyone's address from their orders into another site like SendPro to buy a shipping label? Please tell me I'm missing something obvious so I can go to sleep and not feel like this was all just a big waste.