Because this is a special redemption for this month only and that's why they doubled the ptz points.
FAQ:
Our tech team are able to quantify if you’ve earned 200 PTZ between April 3, 2010 and April 13, 2010 11:59 P.M. EDT (Eastern time). They can also determine if you accrue PTZ through ways not permitted by Lockerz, i.e. creating fake invites, and you will not be eligible if you do not adhere to the Lockerz Terms.
If this redemption finish , you will be able to bot again XD.
They don't really check when general redemptions are.