There are a lot of websites that Sell The Romex® Products and they don't use the ® on their website.
I say Ban the name and do not support that name brand.
Also Buy different brands when at all Possible.
Terry Love Plumbing® has better thing to do rather than being a Romex® babysitter.
You should ban Southwire Company® also, So that nobody steals than name.
Sounds like Beverly Cofield® is getting board at her job and she has a "Need to see Romex®" complex to me.
Their website is one of the few using it, That I see.