It seems now, there will be a chance to arbitrage because binance is accepting erc20 dusk tokens too. But only one way is available. You can deposit erc20 but only withdraw bep2. But wouldn't that cause binance end up with too many erc20 dusk? And what will happen to them?
Yeah, only one way.. But its possible for arbitrage from other exchange like ethfinex (erc20) to binance (BEP2), also arbitrage from binance DEX to CEX or vice versa.

What is the impact from this arbitrage opportunity? I mean is there any special benefit ?
Since the price gap between every exchange isnt really big so i just see it like a common thing.