[latitude]

  You never have to pay anything, and you can keep using 
  Ello forever, for free. By choosing to buy a feature now
  and then for a very small amount of money you support 
  our work and help us make Ello better and better.

This is way too generous and altruistic to be practical. They obviously mean well, but this is effectively a donation-based model and it very rarely works in practice.

What I think they should do is to offer personal accounts for free and charge for enterprise presence. I know a handful of people who use Facebook and Twitter in read-only mode and who follow just the companies. They effectively use social networks as a news feed of product updates, coupons, deals, discounts, etc. Moreover, they explicitly seek out the companies and follow them. If you think about it, it's an insane arrangement - you have people opting in to hear to what you have to say. This is valuable, this is something worth paying for and it keeps the network free for the individuals.