I wouldn't be surprised if we broke it after beta. It only directly edits the user caps, not puts in a proper row into the paid time table, yadda. Any checks with DW::Pay would probably fail -- only the get_user_cap checks would work.

Giving paid time to an account:

1) Make sure you have the 'payments' priv
2) Go to /admin/pay
3) Enter the username you want to make paid in the top box
4) from there it's kind of self-explanatory -- nice and simple!