I’m a perpetual freeloader. Like a houseguest who has overstayed his welcome with hundreds of people, I depend upon the generosity of strangers - in particular, software teams. I’ve used HelloFax to sign documents for years, but I haven’t paid them a nickel. The same is true for GMail, Google Docs, TripIt, TypeKit, UberConference, LogMeIn, Evernote, the list goes on.
For all of these companies and products, harboring freeloaders like me is part of their growth strategy. At the product’s launch, free plans generate the majority of new users and eventually customers for the business and in the case of B2B companies, leads for the sales team. The positive goodwill engendered by a free product feeds word-of-mouth and the product achieves lift-off. All of this is possible because in small numbers, the marginal costs to support perpetual freeloaders are insignificant.