Sometimes we do have to register online for some services or products. I always worry that if I do, the company is going to sell my email adress to other companies, and I am going to get even more spam than I already do. Spam is time wasting, resource wasting, and frustrating!
But, help is at hand: there are some techniques to find out which organisation(s) is/are leaking your email address to spammers.
This Reddit link tells you how to find out.
NB Thanks to Minnesotastan's blog
TYWKIWDBI which alerted me to this useful information.