All in all blue rhinos costs to collect tanks, refurbish tanks,
pressure test tanks, upgrade tanks valves distrubuite tanks then
share the revenue with the local dealer...........

Their costs MUST be a lot higher than the local gas station that fills
tanks as a secondary income.....

So underfilling is likely a attempt to compete with the lower costs of
the low cost operators.......

Not saying underfilling is right but it might just be the only viable
solution..