The website doesn't have to rely on React, Google analytics & CDN, et al. This is a simple website that could have been written in plain HTML and CSS, with server-side analytics if desired.
Edit: That might be from one of the plugins they're using on their WIX CMS though.
> How do they expect others to get free from FB and Google when they themselves are on Facebook and Instagram?
I'm guessing it's because Facebook and Instagram users are exactly their target audience.
I quit Facebook several years ago, but I kept my account and continued to occasionally post news articles to my timeline about their scandals and how social media is personally bad for its users. I did this because I figured it would actually help them for me to just delete my account and disappear to their other users, and the best thing to do was to use their own platform to subvert them.