Lupex

Lupex is a Crypto Price Guessing site. You can guess for free on BTC/ETH every day for free with anyone else that enters. You're guessing the price in 24 hours after cutoff, closest guess wins $5 worth of the respective currency. There are also paid "battles" and head to heads that you can pay to enter. Head to heads you simply get double, the bigger battles organise their payouts like poker games - i.e. they are guarantees, usually if 5 or less enter than you'll win the amount stated and if any more enter then the prizepool gets bigger.