You can gift with your friends to get more free coins every day! In the bottom left portion of the main menu of Quick Hit Slots is a present icon. Click on the present icons to send gifts to your friends, as well as inviting others, requesting and collect your gifts!
You can also increase your daily bonus boosts by inviting more friends to play! The more friends who play, the larger your daily bonus is! To invite friends, click the Invite button next to your presents!