Some are worse than others. Both in practice and the language they use.
I know in Ireland, one rule for a sale price is that it must have been on sale generally (all stores) at the higher price for a minimum of 30 of the last 90 days. So you can’t jack up the price for a week and then claim you’ve reduced it for a month. Similarly, you can’t claim a reduction if it was being sold at another brach but not this one.
Closure. People lie in real life too, not just on the internet.