Today I have had all my masternodes rebooted from vultr. It happened without my knowledge. Just a heads up if you have masternode's on vultr might want to check their uptime.
Had that experience some time ago too, three reboots in a three day period. I finally left Vultr as it is unacceptable to reboot servers without further notice.
A bit off-topic, but I've been doing some testing with VULTR for a few months now. For the most part I've been very pleased, but today I had a high load Linux VPS that managed to go down and wouldn't come back up. It seems corruption managed to find its way onto the virtual disk and strangely fsck would just hang. I strongly recommend taking regular snapshots just in case.