XPN allows you to run raffles in your stream. Simply put, anyone that speaks in chat (or if set, a word) will be entered to the raffle. Once you run !raffleend a winner will be chosen.
You can award a specific point total when they win the raffle as well, this can be found under Chat > Loyalty and selecting to add the "Points" system.
Commands:
!raffleset <word> <followers>
Creates a new raffle. If a word is set, viewers must say that word to be entered, otherwise simply speaking in chat will count. Adding the word "followers" to the end will limit entrants to followers of the channel.
!raffleend
This will end the current raffle and pick out a random winner.