I had a Yahoo account created in year 2002, the time when most of the sites including Yahoo Mail (I suppose) did not support HTTPS. Not sure if that was the reason but with every email exchanged, I found the number of spam messages kept increasing. Later in around 2015, I started using Yahoo's 'Disposable Email Addresses' features but the spam load on my original email address was too high that I had to create a new user account in a year or two later.

I still use Yahoo Mail primarily because of its 'Disposable Email Addresses' super-feature. For my new Yahoo account, I have maintained the habit of creating new disposable email addresses for every site I need to register with. The disposable addresses always contain the name of site/organization I am registering with. I have also kept a few pre-created email addresses at my disposal :) in case I need to provide one on a retail store.

In last five years, there hasn't been a single spam message on any of these disposable addresses. I always had the option to delete these addresses as soon as I start receiving spams on them but until date, I never needed to exercise them. The messages that are moved to Spam folder are always false positives, so in a way, I don't lose sight of any message just because the mailing service decided to mark it as spam.