Yes, you can use it both in non-commercial and commercial projects. You can use the widget as long as "Powered by Happy React" is visible.
When for some reason you want to get rid of the "Powered by" text please contact at hi[at]happyreact.com. We can disable it when you provide similar text on a different part of the website where you display the widget.
Open browser devtools. Check the
Origin header in the request widget makes to
find what domain you should put in the whitelist.