> You end up with lots of different closed-source, for-profit companies in the list, but none of your data is concentrated in any one large player. But many of

> You end up with lots of different closed-source, for-profit companies in the list, but none of your data is concentrated in any one large player. But many of these companies are going to offer their services for free, which means advertising and you're right back to square one, except now your data is in the hands of someone completely unknown.