I'm trying to get my head around it but one thing looks particularly confusing.
The article says that "If the second blockchain has agreed to be a Bitcoin sidechain, it now does something really special… it creates the exact same number of tokens on its own network and gives you control of them."
Does "the exact same number of tokens" mean the same exact amount in Bitcoin?
Therefore, does it mean that there's no exchange rate and you always move coins 1:1 between Bitcoin and a sidecoin?
This doesn't make much sense to me. How does the actual currency amount get converted from BTC to a sidecoin?