Main rules to avoid bans of your group
1. The account used to manage the group must be at least 25% older than the group itself. For example, if the group is 2 years old, the account must be at least 6 months old.
2. You must add high quality bots at a 1:1 ratio. For example, to add 2,000 members, you need at least 2,000 bots.
3. Allow a one-day waiting period after adding bots to the group.
4. Ensure quality invite, preferably using accounts and proxies from the same geographic region as the people you will be invite. if you want the group to live for a long time do not add more than 300-400 people in a day.
5. Do the invite at night, so you reduce the likelihood that the user will go straight in and click the complaint button.
These are basic rules that reduce the risk of bans, but they do not guarantee 100% safety. Also, maintaining an active group (with real user and bot interactions) can help. If the number of chat complaints exceeds 20-30% of the total number of participants, the group is likely to be banned.