I think there will always be a free tier that they'll be willing to use. Even if it sounds hackneyed, those folks will still use it because many people are not discerning readers anyway.
I'm not sure that free tier will necessarily continue forever though, unless there is a way to monetize it (presumably by advertising, or by selling data they've gleaned about the user), or perhaps if there is no privacy and the provider is treating you as a source of free data. Right now we're still in the market-share grabbing "never mind the profits, count the users" stage.