How Does the Random Draw Work
Gleam automatically uses Random.org to draw winners, they offer true randomness. Here's an excerpt from Random.org explaining how it works:
We draw winners using Random.org, which offers true randomness:
RANDOM.ORG offers true random numbers to anyone on the Internet. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs.
Each winner is drawn at random from your valid Entries. Every Action is worth a set number of Entries, and each Entry is one chance to win, so someone with 10 Entries is ten times as likely to be drawn as someone with 1.
By default a person can only win once. Turn on Allow Repeat Winners when you draw if you want them to be able to win more than one prize.
Random.org has a number of certifications from different countries which you can view or request here.