I know we should dilute our dependence on OVH, but cheap and seem to ignore the fact the machine is an exit node.

OVH has a seemingly patented a system to deal with denial of service attacks.  I am not sure what they detect but when they do we get this:

“We have just detected an attack on IP address x.x.x.x.  In order to protect your infrastructure, we vacuumed up your traffic onto our mitigation infrastructure. The entire attack will thus be filtered by our infrastructure, and only legitimate traffic will reach your servers. At the end of the attack, your infrastructure will be immediately withdrawn from the mitigation”

To be fair, the automated system takes it off after an our or two.  If my tor server is left in this mitigated state, the tor exit gets labelled a BAD EXIT which is something to avoid as takes days to be trusted again.   As soon as I get their email I now stop TOR to prevent that embarrassing label, and perhaps doing so stops whatever it is OVH is detecting.  Being shutdown for a few hours seems better than being a bad exit.

Gerry