That's a very good idea, but I'd say many have tried similar approaches and failed before. Now with the power of crypto, it might actually be doable as people have tried social networks paying their contributers before and failed, but steemit seems to be doing very well with the addition of a cryptocurrency as its backbone.

Regardless of the success or failure of this particular implementation, I think the idea is bound to be implemented successfully sooner or later. But I think the value for the individual providing their own data for a fee is bound to stay very low as this type of data becomes valuable only in great quantities, but the value of each individual's data remains relatively low.