Hey Mason,
Usually when the corals are dyed, it is quite obvious. When you see a hot pink Sinularia, there's no question it's dyed. I think the message has been sent quite clearly to the few suppliers left, that thought this was a good idea.
The last dyed corals I saw, were a year ago at the now defunct Aquafanatics. Neon Yellow Pagoda cup coral and hot Pink Leather corals.
I doubt those RBTA's were dyed. As with many other animals, color variance and intensity can range widely. The color of anemones can also be affected by the level of zooxanthellae within the tissue. The stress of shipping can cause expelling/bleaching. This can cause seemingly brighter colors. I have found the color will return in a healthy animal within 3-5 weeks. Direct feeding assists the animal in meeting it's dietary requirements in the meantime.