[jsonne]

You negotiate by not using square and using an alternative system in that scenario. There are price competitive options even for small businesses. The UI might be clunkier and the equipment more dated but that is the tradeoff.

[falcolas]

I believe a sibling comment said it best:

> In practice, [switching vendors] is an extremely weak signal, is swamped out by market changes, assumes zero cost of switching, ignores network effects, etc. One of many reasons why I distrust economist’s assertion of fairness.

https://news.ycombinator.com/item?id=34999021

I'd also pedantically point out that this isn't really a negotiation tactic - negotiation generally involves communication.

"to confer with another so as to arrive at the settlement of some matter"

[lmm]

If you send a message and that message is understood, that's communication. There are many ways to communicate "your price was too high".