I prevent unwanted users from signing up to my B2B SaaS

Hi. You may loose business. I am not giving you my real email. When you get breached (you will) as hackers breach companies all the time I don’t want them having my info. Second, CREDIT CARD? Are you even complying with PCI DSS standards? I am sure you are not. You can use other methods to get spammers. This is foolish.