I've been doing this for over 10 years, but I do get spam on some of them. It comes in two forms. One is that companies subscribe to the marketing emails with

I've been doing this for over 10 years, but I do get spam on some of them. It comes in two forms. One is that companies subscribe to the marketing emails without asking. When this happens, they tend to re-offend on unsubscription, so they had to be blocked by blacklisting. The second form is that they do in fact share my email address with others. Not two months ago booked a hotel in Europe and got a spam from some other company before I got a booking confirmation. So this happens. That all said, the point of using per-company emails is less about spam and more about denying them an option of collating my online activity. The fact that you don't get spam doesn't mean your email address (+ relevant personal details) aren't getting resold, shared and otherwise vacuumed by the data collectors. That's them I more worried about than an occasional spam.