You will likely hear this one a lot. Many people have tried and failed.
You may have tried network marketing before yourself. I had tried, without luck, several times. The company makes a huge difference, but there are many good ones out there.
The real difference is the training system.
Each MLM company has their own, and there are others that are more generic and not company specific. If your prospects tell you they have tried MLM, regardless of their experience, they are a good quality lead. All they really need is some good training and mentoring.
They are already familiar with the concept, and are at least willing to try, so 1/2 of the work is already done for you. Get them plugged into a training system. If you want a Proven Duplicatable System you can share with your team, check the Mentoring Resources tab above.