We're still waiting on final approval for the cash cards, but as soon as we have it, I'll do the prize draw for the first time point. To do this, I'll number the complete responses at the first time point from 1-1013, and use a random number generator to generate a random number (I know, who would have thought?!) between 1 and 1013. Whoever matches up with that number will be the lucky winner of the first $100 Mastercard Cash Card! I'll use the internal email system of Qualtrics (the survey software) to send an email to the winner, and give them a fortnight to reply with a postal address or PO Box that I can send their card to. If we don't hear back in that time after a reminder email, I'll repeat this process until the prize is claimed.
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I'll keep you posted as news develops.