Thanks for your inquiry on Agile PrestaShop membership module - the best and easy solution to membership management with PrestaShop.
I purchased Multiple Seller Module and Paypal Adaptive payments about two weeks ago. They work exactly as described on my dev site.
I am glad the modules work fine at your site. Quality is our high priority, we try our best to make modules stable.
Will the Membership Module work with the Paypal Adaptive Module when set to Parallel payments? My site will allow sellers to be paid directly into Paypal using Parallel payments, but I want them to pay a small fee to site owner to become members and use the site for selling their own digital products.
I am not sure if I understand your question correctly. Let me try to answer it.
1. If you just "want them(seller) to pay a small fee to site owner", you should use Seller commission module. You can set different commission fees/transactions at different level. It will automatically calculate the amount for the store and seller for each order. And the payment is also automatically if you use Paypal adaptive module. The module also maintain the transaction history and account balance of each seller. Here you can find more details of the module.
http://addons-modules.com/en/market-pla ... le-10.html2. If you want use membership module for some reason, you also do so. But you must set the owner of membership(is a product) to the admin (or store). In that case, when sellers purchase membership, it will be paid to store, not going to any seller's account.
3. The latest version of Agile Membership module has integrated into Seller module, so that it can limit the number of products a seller can list. You can set different type of memberships with different limit.
I hope this answer your questions. If not, please feel free to make ask again by make your questions more clearly