3) Registering for freebies ensures that you will get spam.

Actually, the surest way to get spam is to have
is to have an email address at all. It doesn’t necessarily mean that the freebie is to blame. actually it is easy to avoid getting your main email address on spam lists because of freebies. Never use your main email address for that purpose. I suggest having at least two junk email accounts that deal with these. Use one for low risk offers that need verification and use the other for offers of higher spam risk.