Sprint will be excluding discounts on plan add-ons.
Caution: This is NOT a "material change" that will allow you to end your contract early without an ETF. So don't jump the gun -- no jumping ship to come back on for an EVO or whatever. Though some may bitch & complain and get a rep to end a contract w/o ETF, chances are less than 1% will be successful at this.
Heads-up: This may affect your monthly fee if you were lucky enough to have had discounts applied to add-ons.
Read up on it
here. Read the wiki post first!