I think that if you really look at the startup landscape you'll see that there are a bunch of companies trying to charge people (mine included, although we exist in a different domain than most of the startups I run into). The hardest part of that equation isn't the charging, it's getting the buzz out and getting people to even look at your app in the first place.
Just changing the founder mindset to "charge for something" isn't nearly enough.
Just changing the founder mindset to "charge for something" isn't nearly enough.