How should they make money? Services and Storage cost money. Period. That has to be paid by someone. Either be it the users, or some sketchy not-giving-a-shit-about-privacy-advertising company because hosters on the usenet have to sell your data to pay for the servers.
Easy as that.
And since usenet is used for a lot of piracy, i 100% DON'T want it to be financed by shit like this. I pay for it and i know i am safe.
Don't forget. If a product is free - you are the product.