I will give you a script to scrap people out of any group you like and add them to any group you like. This script can use multiple numbers at the same time. You can select any group and it will scrap the username, user id, access_hash, last online time, admins of that group and you can then add them to your group. The scrapper is sold separately for 100$, if you want both the scrapper and adder, the price will be 200$
See the working video here - https://www.youtube.com/watch?v=-QUhpYwkNPM