I didn't know this but thought to ask if I could delete a website and add another website and this is what they said "No, deleting a website also deletes its optimizations, and the pages stay counted. You won't get those page slots back.". For Wordpress app users, this is not the case, you retain the information. But for Shopify owners, the information is not retained. I didn't know this before purchasing - now I know why the limit is 500 pages for one website - you don't get those pages back. Once pages are used, it counts towards the 500 page limit.

Still, it's easy to use and easy to install. Not a big deal if you're a Wordpress app user. For Shopify, 500 is still a pretty large limit, even if you delete the website and add another one.