This month, I’m running about 750 GB on 3.5 TB full node.
On lack of analytics
It might be nice to have a third party opt-in analytics network. Node operators submit a signed public key along with a hash of their node ID… to attest that they are a node operator.
The analytics service could be very simple, just pull the daily bandwidth numbers each day at local time 02:00 … and have a secondary port open which queries the analytics using an authentication token of some kind.
Rate limiting on the data could be set to one query per 4 hours or something like that to ensure that DDoS isn’t a problem.
Low speed chatter between nodes could result in node operators being able to determine their local success rates along with local bandwidth comparison. Those data could then be fed into a localized earnings estimator.