For me big sham on all these projects that have their own chains and decided to move part of their tokens on Binance chain, this just show that most of them are just chasing shadows and do not no what they want to do. It is a pity this seems to be a norm now and we can see many of the ERC20 tokens move to BNB chain also.
Just to be clear, the Ferrum mainnet will go live sometime Q1 2020 if not sooner, during that time the official token swap will occur. While there's a great migration with several projects occurring, there's little reason not to issue more than one token to take advantage of various of crypto chains. The drawback is managing two cryptos until the mainnet swap goes live, but this is mitigated by several positives.
Overall, this structure works for Ferrum Network and the micro-ICO cap that's about to be fulfilled. We aren't migrating post-ICO, this is before any distributions have occurred.