Take the following for example: http://www.boincstats.com/stats/project_graph.php?pr=superlink
with this, the monthly and last 60 days graph is misleading, as it starts with numbers in the the 100,000s. if the number of days with data <60, or the number of months is less than whatever threshold it may be, the base line shuold be 0 indexed, to more accurately show the initial reporting state.
Just looking at the monthly graph, it looks like there was a tremendous gain in credit in july. At the time of this posting, if the x axis was 0 based, the truth would be that 11 times more credit had been gained in June than july