I can think of one reason why OVH is that much cheaper. OVH doesn't bother policing their network. At all. You don't even need to take my word for it, Cisco Umb

I can think of one reason why OVH is that much cheaper. OVH doesn't bother policing their network. At all. You don't even need to take my word for it, Cisco Umbrella has written numerous papers on the subject. They're one of three hosting companies I instantly blacklist across the board when I take custodianship of a network. We don't want their customers business.