The big thing in the WordPress ecosystem is the lack of support. Having had months of issues with a plugin from another website, and no support from them, we scrapped that. We went for WooCommerce, selecting the Serial Key plug-in because of the support we received pre-purchase. Post-purchase, to fix one of our issues, the StoreApps people suggested a Skype call to see what was happening. What a difference compared to so many other plugin providers. Using StoreApps’ Serial Key system we have created the cheapest WooCommerce based software store, supported by a real software company 😊. Thank you so much!