Quote from: Lutpin on July 15, 2016, 08:27:18 AM

Quote from: coinmillions_com on July 15, 2016, 03:59:56 AM

The only reason I used the test was to not pay for the draw since it was over 100 contestants.

Hm, given that this promotion is supposed to bring some revenue to your site and the fact, that the prizes don't come free either,
I see very small arguments for not paying for the draw, given that it would be way more transparent that way.

Quote from: coinmillions_com on July 15, 2016, 03:59:56 AM

We already stated in the rules that NO ONE involved with coinmillions can win, and we have zero knowledge of the winners identity.

It would be easy to bypass that rule, given that the winners are supposed to stay anonymous (for the sake of everyone, that's a good thing).

Quote from: coinmillions_com on July 15, 2016, 03:59:56 AM

That said, if you have a better solution I'm all ears. We obviously aren't out to do anything wrong or unethical.

Having a (paid) final draw might be a solution.
I'm not accusing you of doing anything wrong or unethical.
I'm just looking for a way to make this giveaway fair and transparent to all participants (yes, that's indeed including me).
After all, they gambled at your site for it, don't you think they deserve it?

Quote from: coinmillions_com on July 15, 2016, 03:59:56 AM

Also. Nothing would stop anyone from running several 'final draws' either so I'm not sure how that would solve it.

Actually, they list all draws you had in the last 3 days.
So unless you're going to create new (paid) accounts and do final drawings up until the result suits you, that's indeed preventing you from redrawing.
Have a look at this draw here as example:
https://www.randompicker.com/Project/Public/Protocol.aspx?Key=334903x31728
You can see the list of entries and search for your own entry in the box below. You can also see the name of the draw, the date, the terms and most importantly, the last 3 days of draws.
https://www.randompicker.com/Project/Public/ProjectsRecent.aspx?Key=334903x31728
That way, you would catch any try to redraw the whole giveaway and could easily verify your participation in the list, aswell as the winners.

Quote from: coinmillions_com on July 15, 2016, 03:59:56 AM

If you know of a smart provably fair solution, I'd be happy to use it on the next giveaway in a week or so. Actually, I'll be more than happy to pay someone to run a provably fair drawing.

An easy solution without the need of a 3rd party would be using the block hash (or the last 1/2/3 characters of it) of an upcoming block in the bitcoin blockchain.
It's the common way how raffles in the collectible section are organised provably fair, without the need to trust any 3rd party drawing service.
If you need help with organising a drawing that way, I'd be willing to assist you.

You make excellent points, and I feel sort of dumb for not taking the integrity of the drawing more seriously.

We would happily pay you to organize our weekly or biweekly drawings. Actually, having a third party do it might be a really smart idea, and if we do it provably fair on the blockchain even better. PM me and we can get it setup!