Student or Learner
The following sentence is confusing.
Encourage people to sign up for your email lists with free ebooks or similar content.
Is this saying "people sign up for your email lists, you can put their names and email addresses on your email list, so that you can send them free ebooks or similar content when they ask or when you want to send?"
It means that you should offer them something free in exchange for their signing up to receive your newsletter or other future communications from you.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.