I was just recently reminded about a free way to easily get cash back on online purchases. I have been using Raise, Honey, Ibotta and Checkout51 to great success this year, and have saved more than $200 in the last 5 months. But I could’ve been saving even more that whole time! My sister actually sent me a referral for this other free cash back service nearly two years ago and I cringe when I think of how much money…