Then how did Alex Bosworth reach $2,500 in routing fee earnings?
That much should be obvious, he's CEO of
https://yalls.org/, which sometimes used to try LN first time. Even myself have tried it previously, even though i use testnet edition few years ago.
Simply have lots of capital isn't enough, there should be reason why i should connect to your channel. People is more likely to create new channel when they pay for service or goods.
So simply, he's earning by leveraging his company, yalls.org, to have as much connections as it can? Why aren't exchanges starting to run/operate their own Lightning nodes? The incentive is there.