YES.
If a user's content has been flagged as offensive and removed then the voucher will automatically be removed from their reward feed.
Our rewards are INSTANT, because we know that's what our users want so in some instances a user might be able to redeem the voucher after uploading an offensive, silly, abusive piece of content.
We operate a strict 'TWO STRIKES AND YOU'RE OUT' policy so if they do it again then they will be banned from Tikklr.
We would say on a positive note that each voucher you issue potentially can lead to a sale but we in know way encourage abusive or offensive content.