..."“They don’t care about open source or owning their data." These people are either ignorant, or complete morons. These website tech companies own and control your data, including your sales figures, customers lists and possibly credit card numbers, and God knows what other personal information is been stored in their servers. Do they want to rethink again for not owning their own data?

ECWID is another perfect example, they even have a WordPress plugin for it. It's a Russian company hosted on Amazon cloud servers. It's not as comprehensive as woocommerce or like some of the other e-commerce big boys, but it's easy to use, and because it's cloud based, you can create a catalog, and publish that same catalog on unlimited number of sites, in a matter of 30 second setup for each site. The problem is that (besides the fact that there are better solutions out there, not to mention FREE), THEY OWN YOUR DATA... and if you spend 3 months to create a nice catalog of 5,000 items and the next day the company goes belly up... you would be out of business and mental!

How some people do business and are staying in business, is amazing... you should always have control as much as you can in everything, and possibly have the knowledge of how a certain task is done by your employees or contractors, or at least have contingency plans, otherwise, sooner or later you will face a catastrophe... and not owning your own data is one of those situations to be avoided by all means.