Normally when you enter an 'instant win' sweeps you need to use 3 coke points. There is an alternate method of to enter where you get one free entry every day w/o using any points.
On any of the instant win sweeps there is a 'rules' link. Click that and scroll down to #5 section b. In that section there is a 'click here' link that allows to to enter one sweeps free. You can do this once a day.
Actually, most of the instant win sweepstakes at mycokerewards allow you to enter up to 5 times a day across all instant win sweepstakes. You can enter 5 times on one sweeps or one time each on five different instant win sweeps.