Yesterday my wife & I shut down her Square Online store after 3 years due to a price hike by Square when they deleted their lowest tier plan. I’m definitely not able to claim I’m any kind of E-Commerce or SEO King after the embarrassing loss we made on that site with even the lowest cost plan, but I couldn’t recommend that platform to anyone due to really bad pagespeed with the page builder being too bloated with DOM and other engineering faults that were probably very bad for SEO. We may spin an online store back up again in the future, but it will be with a different provider.