A consecutive series of run tickets might be useful to gauge actual production over a given period.
If a series of run tickets were to be produced that documented the quantity of fuel that was transferred over a given time period then revenue could be roughly extrapolated.
Cash is King until further notice!!! My comments on companies are usually my opinion of long term success (years). The PPS may go up or down greatly in the meantime depending on the number of greedy fools with money.