Miscounts number of uses. My first attempt still had text selected (from a regular find), and it not only complained about my having had text selected *after* doing its thing, not before, but then, when I corrected this, informed me that I only had 28 runs remaining -- after one run.
If you can't figure out where to appropriately do your "i--" and where not to, don't try and sell extensions, mate.
Also: Your attitude towards the amateur users is unprofessional. Coming across as a self-satisfied smug knowitall just because you know things they don't may make you happy in your mom's basement but it's not really useful for you out here in the real world.