So, as a media company offering my services.. I can't in theory: send emails call send letters send msgs on socials to somehow advertise my services, if these business did not give me the authorization to do so. How the hell am I expected to get clients? aside from clients referring other clients, which is impossible at the start of the company... Exclusively by paying for traffic on search engines, socials, etc? Can I still be sued if I send letters to business which exclusively asks them to partecipate a completely free meeting? I think...yes, even that could be "advertising", as even if you do never ever mention your services, the court could easily understand it's a kind of "lead magnet" and therefore identified as "advertising". What? Maybe I'm wrong and that's just for personal emails/numbers? Contacting business phones and sending emails/mails to business adresses for marketing is legal even without optin ?