And then put your email in their marketing database which no doubts gets shared with creepy entities that stalk people. No thanks.
I once gave my email to a store in the UK when they offered an email receipt (I suspected something bad would happen but decided to give them the benefit of the doubt). Of course, a few weeks later I received some BS from a third-party company asking for "feedback", so there's at least one extra third-party that now has my email without me authorising that.
If you're that concerned about "privacy", then yes you should.
Do you also pay in cash for everything? If not, you're already being tracked by your credit cards and will be re-marketed to... You may as well sign up for rewards/store cards and get the discounts.
I once gave my email to a store in the UK when they offered an email receipt (I suspected something bad would happen but decided to give them the benefit of the doubt). Of course, a few weeks later I received some BS from a third-party company asking for "feedback", so there's at least one extra third-party that now has my email without me authorising that.