[gregoriol]

The guy is not talking about free tiers but about free services though.

Free tiers are good if correctly sized compared to paid tiers: they help users get to try/know your service, they allow students and kids aroung the world to play with things, they help small companies grow; if your free/paid tiers are well done, those users who start with the free tier will grow to the paid tiers. If not, it's should be ok too, not everyone is going to need all your features.