Veg ghee or butter ghee? If you get the chance can you ask them why they do it this way and if it's veg ghee why do they think they need it? Cheers.
My view on the entire veg ghee debate is texture, richness, and mouth feel. Both coconut and palm have saturated vegetable fats (which are heart healthy). These mimic the texture and feel of animal fats and most definitely are distinct from other veg oils in their effects. I've done extensive amounts of vegetarian and vegan cooking, and I can say with certainty that it is possible to mimic animal fats using these substances.
Veg Ghee will mimic the richness found in real butter ghee, but at a substantially reduced cost, hence why it is used by many takeaways and restaurants. I use Veg Ghee when I make my dishes and while not slap-you-in-the-face prominent in the final dish, it definitely makes a noticeable difference.