I work in a small Museum and we need to mark artifacts for filing after they are placed in archival storage containers. Once they are stored and labeled permanently the temporary markings are just discarded. We feel free to make notes to other workers and leave them on the outside of folders for later use as the price is within a reasonable budget.
As far as I'm concerned it is true what others have said; I can't tell any difference between these sticky notes and the more expensive brands. This purchase was a real bargain.