People here generally do not take offense at linking to companies/sites/products/stuff we've built. Why should we? It's only 'shilling' if it's pushing it where it's not appropriate. Otherwise, we like to link to the stuff we've done - we're proud of it, by and large. In any case I strongly agree that having something to look at would be useful.
I think the mix is about right where we have it. I don't want to see more submissions shilling products. If you find out something interesting in the course of building your product or growing your business, please tell us about it. If you put a link in your profile, those who are interested will follow.
In my view that's appropriate "shilling" on this site.