Another point the article misses is that time limited price increases are a good way to dis-incentivise hoarders: "This week only, toilet paper is 100% more exp

Another point the article misses is that time limited price increases are a good way to dis-incentivise hoarders: "This week only, toilet paper is 100% more expensive". To me that seems like a very reasonable policy to make sure people who need it can still get it, while at the same time sending a strong signal to only buy as much as you need. That the seller profits from the policy is just a side effect.