- sniff packets intended for the pool (this used to be possible on OVH if you were on the same subnet as the intended host, probably still is)
Which pools were you connected to?
Sniffing details about packets.... I am not sure if this is possible, as the ethernet switch would prevent sniffing a traffic meant for a different port.
But you know... One could sniff the traffic also on Internet exchanges or redirect the traffic on BGP level - just to catch the traffic.
One cannot reasonably expect that Internet traffic would be hidden - as it is not.