Love Omnify!
That's where I'm going to start and end my review. I've got over 20 active store subscriptions that I find very innovative to set up a store for clients needing their services listed and sold in one place.
Easily connectable to Wordpress and other webhooks imaginable. The Zapier integration is the bomb too!
When you think of Shopify, you think of it as the place where makers sell their products. Think of Omnify as the place where you market your services.
Support is amazing at answering my questions as well. So really, you're in good hands.
Try em out!