You should always remember that the quality of subscribers is more important for the community, not their number. A group of 50,000 members promoted via ads or bots with 1 like on each post is not a community. It's a wasted ad budget.
It’s more important to have a few genuine subscribers who will be interested in your brand and create unique UGC. These users inspire more trust in other people: According to a
Nielsen study, 77% of consumers trust the recommendations of friends, 62% trust brand reviews on the Internet, and only 30% trust ads on social media networks.
The goal of community management should be to build a group of supporters who will help spread the word about your brand, rather than gaining a million subscribers who mute your group and don’t participate.