Platinums, any anyone staying in the room with them, get free breakfast, if they choose it as their welcome amenity. Easily beats the 500 points (which don't even count towards status) or drinks vouchers in terms of value.
It's a well-known spiel to be offered "points or drinks voucher?" - the answer to that should alwys be "breakfast please", unless it's included in the room rate, e.g. at HIX.
Oh forget that, mix-up with Accor. Sorry. You ned to be Diamond for the free IHG breakfast.