We recently posted a deal where you could donate $1 to Republican Gov. Burgum and get a $20 gift card. It looks like there are two other similar opportunities.
There was another one that was donate $1, get $10 but I can’t seem to find mention of that any longer (Update: It is Perry Johnson, deal here). We will keep this post updated with any other opportunities. If you’re wondering why somebody would do this, you need 40,000 unique donors to be invited to the first debate.