I keep activity logs on this server. I occasionally look at them, compile statistics, check where my traffic comes from, figure out who's using how much disk space, find broken links, and so on.
I'm not going to sell your browsing habits to anyone. I'm not sure what the point would be, anyway.
A few other people have accounts on this server. Some of them can see the server logs, which are not currently separated out by virtual host. I have no control over what they do with this data, but I expect they'll use it for debugging purposes only.
The above policy is subject to change without notice.