As of my last update in January 2022, here are some legitimate strategies to increase members in your Facebook group:

Optimize Group Settings: Ensure your group settings are configured to allow anyone to join. Open groups tend to attract more members as they are visible to everyone on Facebook.
Promote Your Group: Utilize other social media platforms, email newsletters, and your website to promote Buy Facebook Group Members. Share the group link and invite people to join.
Engage Consistently: Regularly post engaging content, questions, polls, or discussions within the group to keep members active and interested. Actively participate in discussions to foster a sense of community.
Cross-Promote with Similar Groups: Partner with other Facebook groups that share similar interests or demographics. Cross-promotion can help expose your group to a wider audience.
Offer Value: Ensure that your group provides value to its members. Identify their needs and interests and tailor your content to meet those needs. Offer exclusive content, resources, or discounts to group members.

Run Contests or Giveaways: Organize contests or giveaways exclusively for group members to incentivize new people to join and existing members to invite their friends.
Use Facebook Ads: Consider using Facebook Ads to target users who may be interested in joining your group. You can target based on interests, demographics, or behaviors.
Leverage Existing Networks: Encourage existing members to invite their friends and contacts to join the group. Word-of-mouth can be a powerful tool for growth.
Optimize Group Description and Cover Photo: Ensure your group description clearly communicates the purpose and benefits of joining the group. Use an attractive cover photo that reflects the group's theme.

Host Live Events: Organize live Q&A sessions, webinars, or interviews within the group. Live events can drive engagement and attract new members.
Collaborate with Influencers: Partner with influencers or experts in your niche to promote your group to their followers.
Create Shareable Content: Develop content that is highly shareable and encourages members to invite their friends to join the group.

Remember, building a thriving Facebook group takes time and consistent effort. Focus on providing value to your members and fostering a sense of community, and the growth will follow naturally. Avoid using unethical tactics or tricks to inflate your member count, as this can lead to a low-quality group with disengaged members.

How to Increase Facebook Groups Members Tricks