Just had this happen today. I tried to convince a member on SM to add me to their favs by clicking on the heart button. No charge. I explained totally free, but for some strange reason, this new member couldn't figure out the heart button. I get he's new, but despite explaining what to do, this guy just couldn't figure out how to click on a heart button. Hopefully he learns how to do this in the future. WTF??? SMH.