You got your javascript widget and your noscript tag. You could even stick some regular HTML with a link (possibly an image instead of text) below those. Your users will copy-paste the widget along with your link.
This is a pretty strong SEO technique. You should be doing that already. You don't need to stick unrelated links there, just link back to your Twitter-themed site.
... Which gets him more unmonetized traffic. But yeah, of course he should be doing that.
Note: I wouldn't use the noscript tag. I'd either have a div that was replaced via javascript or a small/light chunk of html below the javascript. Pretty good chance of noscript tags getting dinged by Google given how they are being used.
