Last weekend I learned the biggest lesson in life... DO not submit to those web sites, Spammers are getting smarter and using those website submission tools to legally opt you in, into their spam mailing lists.
The last I remember was submitting a form, and before I knew, I was bombarded with thousand and thousands of SPAM. So much of it, I had to end the life span of one of my most used email addresses. Now I`m trying to recover all my critical email and subscriptions since I got rid of that email address.
Another thing. Spamhaus blocked my IP, crippling my business for about 3 days...
Web Developer / Owner / Consultant
When starting your own business the need to "know-how" is greater than money!