You purchase points at a rate of 80 per $1USD. However, when using the Premium Content and Commissions Widget, dA takes a 20% cut, so you charge (or pay) 100 and the artist withdraws that as $1. Less confusing that way is the only upside to this 20% cut.
Write : iconpoint2penny1 :: iconpoint2penny2 : without the spaces.
Remember it's :icon: and not :dev:.
If it doesn't line up, the browser loaded the icons at different times. Sorry.