Product sells itself outside of enterprise though. I'm just saying that it is possible to have a product that sells itself, and reaches great success without having to have salespeople.

Maybe Word and Excel aren't the best examples, but I don't doubt they could have succeeded if they only gave it away to EDUs and had a base plan for consumers and a self-service enterprise plan. Microsoft had a foothold in desktop market so pushing Office and getting users to use it was easy. And once you try it, it does sell itself.

But I think Trello, Craigslist and Wikipedia are great product examples. You need not have a sales team to scale everything.

You can achieve that with a great product, great customer support, digital marketing and word of mouth.

I think you have definitely proved me wrong with Trello. Upon reflection I have been on that platform since perhaps day one of its release (I was reading Joel on Software blog posts usually same day back then). I know for sure since the first month (Sept 2011 Trello tells me that) and I am pretty sure I have had a paid plan for nearly a decade, probably dating back to late 2012 when I authorized Zapier to connect to my boards for automation.