If you decide to re-draw some of S3 winners use a public verifiable random number generator. You can use hash of a future block as a random number.
First, publish a numbered list of miners eligible for the draw, sorted alphabetically, and the block number 10-20 blocks away from the current moment the hash of which will be used as a random number. Wait for the announced block to be mined, convert block hash to a decimal number, take modulus of the number divided by the number of nominees and you get the winner's position in the list.
Would have been a great way to do it. Announce 1 winner a day, legitmately, and send out the prize, that day.
The way this pool did it, for whatever reasons has made many people believe they where winners. This prize is meant to be a big gimic to get miners to mine here. Yet the prizes where never real. If they where, people would actually receive the item they supposedly won. I am the "Aug 22" winner, on Sept 3 being yelled at by support for asking questions, which ThePwner admits to
IGNORING!
There is no randomness in this giveaway by s0br, clearly they can give out a miner to whomever they chose. The fact of the matter is you cannot call this drawing provably fair as the rules, and eligibility are changing on the fly. Also, don't forget to mention we are in september, for an august giveaway. In a industry that's net hashrate can grow as much as 50% in a month alone.... To think the operators have no care for the speed at which they pay the individuals says a lot.
They are willing to advertise, and give away money. But the incompetencies from the pool operators, to the customer support is very very troubling.