You will have the ability to choose who will buy your data.
Thats a great idea
Love is choosing them and then having to realize that they would be nothing without us users
This feature must have different categories so we may know where and what company our data is going to
I think the idea of categories would be great, since individual companie- names could get quite confusing pretty fast, given the sheer number of companies :). Maybe you could implement the possibility, to see the individual companies belonging to that categorie in the future, so that one can select specifically, which to support or not, but I don't think that should be a necessity right away.
I'd like to know the names of the people/companies that buy my data, but also be categorized.
Create categories with the specific companies so that the user can know where exactly their data is going to?
In most cases, users do not need to be given specific company name. Create categories of buyers such as SEOs, Vendors, Life insurers, Banks etc. That can give fairer idea to user as to where their data is being sold.