Like in 'move fast and break things', you are willing to compromise reliability/stability in favour of speed.
"Frugality" is a bit less explicit than "move fast _and break things_. I think the reason it could be considered an anti-value is because it implies obvious _costs_. For example it can cost time in "shopping around", or it could mean that you miss out on opportunities - for example missing out on a great employee because you pay below market rate.
Overly cautious, ponderous delivery is the negative behavior to be avoided if you value “move fast, break things”.
"Break things" is also obviously not to be understood in isolation. Of course breaking things for no reason is not positive. It means that you will break things if you move fast and take risk and that it is unavoidable and worth it.
Value: move fast (positive)
Anti-value: break things (negative)
Breaking things is not positive normally, but it's the compromise for moving fast.
It seems to imply that a "value" means "more". It does not. "Frugality" is a value of that is a behaviour deemed important to follow, it's not an "anti-value" (whatever that might mean).
Similarly, "move fast, break things" means you value action and risk-taking.
I was expecting "anti-value" to mean a behaviour deemed negative and to be avoided.