Shopping Cart Integration with ProSites

Hello:

I want my users to be able to sign up to ProSites and then immediately offer them other products/content that complement their subscription. Since ProSites doesn't allow for product or content sales can it be easily integrated with Woocommerce or MarketPress so the user can have a seamless user experience?

I want the user to not have to "sign up" to a new shopping cart since they would have just signed up for ProSites.

I would love to be able to redirect users to the product/content I choose as soon as they sign up for ProSites so they aren't lost in anything else first.

It would be great if they didn't have to enter their name, email address, credit card information, etc all over again to make the next purchase. Easy upsell is what I'm shooting for.

Thank you,

SP