Yup...and you are going to get gay polygamous marriages as well. SCROTUS just opened a Pandora’s Box for all manner of fraud and abuse. I imagine that you’ll have group sham marriages for purposes of securing benefits from employers and the government. When this happens, employers are going to have an impossible time figuring out how to handle those benefits and Social Security is going to be screwed.
The best case for a group sham marriage would be an organized crime family. This is how they’d have legal protection to avoid being forced to testify against each other.