That was because I was responding to you saying they were highlighting cars with LED lighting and me pointing out what they advertise changes.
I don't know the costs involved and the potential profits, but that's what the "Loop" section is about - building tunnels for electric cars, with all infrastructure there prebuilt. Considering it's a Musk company I assume that's relating to Tesla.
I have no idea whether the company are cheaper at building tunnels than others, or quicker, but there's nothing wrong with what they're selling, I would need to know a lot more about their business to criticise it - if it's cheaper it will sell, if it's not businesses will use alternatives.