$100 is the minimum checkout. Definitely read the link that deluxdon posted. You'll find it very helpful.
Having an adsense account or not ? google adsense minimum payout is 100$ AND YOU WILL RECEIVE IT THE FOLLOWING MONTH
Yeah it's $100. The same goes for Amazon's Mech Turk and Amazon's Kindle Publishing. Upwork has that same minimum too... I don't know why they'd have a minimum to be honest. That's unfair to people.