Are commission "rebates" legal in PA?

Im a new agent, so I'm willing to make sacrifices to get my foot in the door. I recently saw a Kevin Ward vid, where he said instead of reducing commission, offer a "rebate" at closing for reviews online and names of people likely to buy or sell. Some have said it's perfectly legal to give sellers their money back at closing, while others have said it may be in violation of RESPA. Kevin has been in the business for decades, so I would think he knows what he's talking about. Any thoughts on this?