[username332211]

The thing is, if you have any of (b)-(f), why shouldn't you also get (a)?

The maximum fine is 20 million euros or 4% of revenue, whichever is higher. Sure, it probably won't be imposed on a first time violation, but why take the chance?

Could you imagine any lawyer advising a company against requiring consent, even if they have some cover because of a legal obligation? Isn't it much safer to deny service to those that refuse to consent?

Sure, it'll annoy the customer, but right now the customer is used to minor annoyances.