Actually nowadays there are many hosting providers and companies that will advertise unmetered or unlimited bandwidth and also put up a small notice in their TOS about fair usage policy apply, that would mean if you really go beyond like 300TB on a 1GBPS uplink unmetered port, they will block your traffic and send you notice to upgrade your bandwidth and pay for it, if you really want a real unmetered bandwidth port, it can cost you quite a lot, though many times this tactic works even many companies share a single 1Gbps uplink port with different clients and provide them all with unmetered bandwidth.
So I would recommend you that if you are going to use intensive bandwidth resources always demand for a dedicated uplink port, as in shared it can hinder your upload and download usage, so with dedicated uplink and unmetered bandwidth the cost can go high, so either you can opt for a dedicated uplink with metered bandwidth like 100TB or if you have the budget then unmetered bandwidth on a dedicated uplink port can be fine too.