Of course it is worth it because Binance has some similarities with Ethereum.
ETH 2.0 means to be upgrade for Ethereum, it will bring a lot of improvements to the network. If they are successfully running it that means the upgrade does bring something good for the project, then why not follow it and do the same thing too since it is also good for their own.
what is the con for doing something like this? not being an original? I do not know.