Just Leave Money in the Account
Don't laugh. ProPay doesn't benefit from this option. In fact, leaving transaction proceeds in each merchant's ProPay account can be the easiest way to provide them with multiple ways to manage their funds. It also helps partners avoid the massive effort that it takes to build a banking interface for their merchants. (Reading in our data dumps and web hooks to provide access to 'bank statements')
Pretty much every option (with the exception of sweeps) can be managed on the ProPay website whose various components can be white-labeled, and embedded into your platform using Single-Sign-On . ProPay recommends letting merchants manage their own funds when a partner wants to allow purchases by those merchants using Spendback.
The ProPay MasterCard Debit Card
ProPay can provide your merchants with a branded debit card (our brand for free. Your brand for an initial setup cost.) tied directly to the balance in their accounts. We send these cards all over the world as part of our Global Disbursements product, and they work great. Merchants really like them because they offer easy access to the funds that settle in their accounts. Partners also like the ProPay card solution because it creates another revenue stream which we can share.
Partners who provide the ProPay debit card to their merchants cannot use ACH sweeps, and in almost all cases, card-using merchants manage their account on our website. (Where Single-Sign-On is, of course an option) There are a couple of methods that might come in handy if you want to manage the entire user experience yourself. Namely Flag for PIN Mailer and Mark Card Lost/Stolen