Unless you're on the 10mbit or 100mbit flatfee plans (though I'm not sure even those aren't), you're on shared bandwidth. Leaseweb just has more bandwidth than the other "grey market" datacenters out there, and they charge enough to not oversell it.

Anyway, as far as Leaseweb knowing what you're doing, everyone with the money to torrent there does, and Leaseweb has yet to care about it. Copyright law enforcement tends to be pretty lax in NL. Its probably not worth bothering with encryption.