To understand this better, I tried to work through a simple example where all payments are for 10k sats.
Let’s assume the node typically routes payments of around 10k sats, earning about 1 sat per transaction. Also, assume that 2 minutes is a reasonable time for an HTLC to resolve.
Now, suppose someone wants to lock a slot on the channel for a payment that could take up to 2 weeks to resolve (ignoring liquidity for now). Then, the opportunity cost for the slot is: 2*7*24*30*1 \approx 10,000 sats.
So to send 10k sats, they need to lock an extra 10k sats?
If I got this wrong, can you do the calculation given these parameters?