BlackRock sets the fees at 0.30%. Lower than expected. Ark is changing it to 0.25% some minutes after blackrock. This means that of course they all known ETF is going approved for all. But not only that, there is going to be a lot of competition to quickly attract the most number of clients possible as soon as possible. I wouldn't be surprised if some offer a no fee for a limited period. Be safe. Don't fomo too much ;)