The value of AdultWork.com Credits is stored to four decimal places, e.g. 15.4592. Virtually everywhere the value of credits is shown to two decimal places with the figure being rounded accordingly.
The figure above would typically appear as 15.46 credits.
If you hover your mouse over the amount underlined it will show you the figure to four decimal places.
This wasn't apparent or a problem until the introduction of VAT on digital services when adding percentages to values increased the likelihood of numbers being generated using the full four decimal places.
The fallout is negligible except you may believe you have 0.01 more (or less) credit than you actually have. This might cause issues when, for example, you are buying or bidding on something that is the exact value of your balance. With the above figure in mind, if you bid 15.46 for DirectCam Positioning, this would actually result in your bid not being processed as it would be more than your actual balance of 15.4592.