Look around the active threads mentioning Olaz: There are a few complaining that they are missing the payout.
For years, these "offers" have been reported as failing in many instances, so you may be reluctant to accept one or even to bother others to help you.
My two Pfennig on these is, prepare to accept the feeling of getting scammed.
It may be more effective to directly invest in credits than to hope for an extra bargain!