It is illegal (see below article). 

Abdullah said it could be illegal. 

This is an example of someone violating law to make more money, and it could eventually come back to bite them.

Some of which may not be the intent and may in fact be illegal. 

Yes, they can dispute the charge and then the CC company will have to open a dispute that you will have to answer to attempt to get your money. 

Money is money.

Here's a post I made on "non-conforming" vs "illegal/unpermitted", understand they are NOT the same thing.

Negligent forest management, drug addicts, or illegals? 

By and large, QI's have very high ethical standards, and are sometimes overlooked as the engines of this tax saving tactic.]REPUTATION MARKERS 📊INDUSTRY STANDINGMembership in professional organizationsLeadership roles in FEAEducational contributions to the industryRelationships with major title companiesCLIENT RELATIONSHIPS 👥Testimonials from CPAs and attorneysReferences from title companiesLong-term client relationshipsTransparent fee structuresRELATIONSHIP RED FLAGS 🚩Overly familiar with your realtor/brokerKickback arrangements (illegal!)

The benefits to the seller including dumping a money pit that no one can get financing on, dumping a property that has a nasty lien or judgment against it, selling for more than the property is worth, dumping a property that is contested in probate, things like that.