How would the payment work?

You pass along a message, and get a token in return. Then, some options:

1) the message never makes it through

2) the message makes it through, via your path

3) the message makes it through, but via some other path, and yours is really a dead end

Also, how would you handle the case where multiple peers all get the message and send it through the same bottleneck node? I guess you’d want to have some incentive to widen bottlenecks, so that no nodes become important…