I have had Schwab for 18 years and they were cdel for the longest time. Now it assigns randomly. It's rare for me to be under VNDM but it has happened a handful of times. They seem to go for etrf and cdel first.
I seriously do not ever see any dilution issues with GEGI. When VNDM is there, he is easy to shuffle around. We just have retail selling to chase another party. It's the nature of the beast. Remember when GEGI ran over .005? It's easy. It will happen again, even with the smallest update