The Subhide power makes the star, heart or cross on your pawn appear black while keeping all of the normal subscriber abilities. These abilities can be, but are not limited to: avatar effects, subscriber only smilies, or the ability to use powers.
Note: Without the Subhide power, the black star, heart or cross means the user is registered and not subscribed.
Subhide also removes the "Subscriber" tag in your account window (when someone hovers their cursor over your name/pawn) and replaces it with the "Registered" tag.
Users are still able to see that you are subscribed (have days) by clicking your name and viewing your powers.