Do you reserve the restaurant exclusively for yourself? No. So this scenario is not really similar at all to skipping the line at a restaurant just because you

Do you reserve the restaurant exclusively for yourself? No. So this scenario is not really similar at all to skipping the line at a restaurant just because you visit often and tip well(which means you are paying a premium here). It's turning away the entire line for a single patron. The restaurant better make sure that's in their best long-term interest before pissing off the other patrons. Also the number of patrons willing to shell out for leading-edge lithography is probably in the single digits. TSMC can't rely on foot traffic to pick up for lost business elsewhere.