I stopped tracking this year... Too little money for the time wasted in it.
Anyway, I use an excel spreadsheet. Photo name on the first column, agencies names on each of the other columns. On the crossing cells, I use green background for the accepted images, orange for the rejected ones, white when not submitted (and if not able to submit, due to the minimum size, for instace, a "-" in it). Then I put the number of downloads on each of these cells, and if there are FLs, I add this info as a note.
In a separate tab, I put the monthly earnings with each agency. This is the only info I still update.