How do I get people to join my FB Group

I have a FB group and I am looking to get people to join the group. I have run Fb ads and boost some of the posts I have on my fan page, but all I get are likes and few post shares. Is there any way I can accelerate this? I am a newbie and would like your suggestions.
Thanks in advance

1.Make some fake accounts,provide a freebie,build relations,make friends and invite them in your group.
2.Same as step 1,Give a freebie and direct them to your group to recieve it.
3.Connect your Facebook Page to your Facebook Group and invite Page Likers to your Group.
4.Scrape Emails from Facebook and Instagram,Do some Cold Email Marketing and those who show interest so send them the link to join your group.
5.Keep a relevant name that you think people will search for.
6.Share your Facebook Group's Link to other Social Media Platforms.

Thanks. any tool to scrape email from FB?