I have been doing the same thing, for about the same amount of time. The only "actual" spam I ever get are for email addresses where the marketplace has shared

I have been doing the same thing, for about the same amount of time. The only "actual" spam I ever get are for email addresses where the marketplace has shared my email address with the seller. Ebay, especially. I have to rotate my ebay email address periodically and block the old one in order to keep the spam down to a reasonable level. However, I still use custom email addresses when signing up with various companies/services because the trend over the last five years has been for every company (large and small) to automatically subscribe you to their asinine daily newsletters and other marketing crap even when you specifically opted-out on signup. Yes, the emails themselves _usually_ have unsubscribe links, but those only have a 50% success rate in my experience. And this is from otherwise reputable companies. Easiest to just block the whole email address and move on with my day.