structural read of Open Sign, from the source rather than a playthrough (flagging that so you know what kind of read this is).
what lands: the flip is a real control. one committed open, the door shuts itself, so you're never "holding" service. the +8c/+2k chips make the trade legible before the choice, and "the sign is off" as the win line is the right beat.
the break: medium rent is 108c total and the cap is 40 faces. a spender pays 8c for 2 faces, 4 coins per face. fourteen spenders clear all five nights at 112c and 28/40 known. so a player who learns to only open for gold never trips "too well known" or the someone-is-watching warning. the cap only punishes spamming the sign; the moment you pick your spots it's a bar that never fills. that collapses the four types into gold = yes, rest = no, and the quiet/regular customers the premise is built on are the correct ones to turn away.
two cheap fixes, pick one:
1. make knowing someone sticky instead of per-visit: a face you've served before adds more known than a first-timer. now the people worth keeping are the ones who fill the window, and snubbing the quiet is safe but sterile.
2. give the flip a commitment: longer open plus a cooldown, so opening for a gold drags in whoever is 40px behind. timing-for-gold then carries the street as a tax instead of being free.
minor, same block most of us shipped: meta viewport still has user-scalable=no. worth dropping.