Currently Vultr supports the Bring your own IP Space feature: they provide either IP Address Advertisement or full (or default route) BGP. They provide the normal IPv4 and IPv6 addresses (used for peering) and also set up a BGP session from their AS to your server. This, combined with the private networking can really help. I know it's not a popular feature: it's unlikely that 99.9% of the customers will use it, but it's definitely a good-to-have. Even if it requires manual set up and is not automated.