_ursu

1.8PB/month is an average of 5.48Gb/s. Assuming you can make do with peak capacity of ~4x average, you can buy 20Gb/s of transit for ~$2k (these guys for example https://www.fdcservers.net/ip-transit.php). You can probably get a decent deal from somewhere more well known if you ask for a quote, with that kind of traffic, especially if it get a little publicity.