That license is on X-tags. We use X-tags as a shim to get Web Components to work on many browsers. We use no code from the Polymer project. At the time we were

That license is on X-tags. We use X-tags as a shim to get Web Components to work on many browsers. We use no code from the Polymer project. At the time we were evaluating we decided to go straight web components with X-Tags as a shim. I haven't kept up with Polymer but I don't think it offers database integration so its really not comparable to Greyspots in any way. Different goals entirely.