Firstly, the notice regarding the mandatory requirements are totally fake. You do not have to carry any kind of alcohol detection equipment in your vehicle, and, therefore, you will not be fined if you don´t. There are also currently no plans for this rule to be implemented in Spain.
The adverts, warnings and notices are all a scam, aimed at encouraging innocent victims to visit a website, view falsified news reports, and then purchase the breathalysers direct from the supplier.
There is no evidence yet of anybody having actually been scammed, but it is only a matter of time before somebody does.
Remember, this notice is totally fake, you do not have to carry a breathalyser in Spain.