Invite and add competitor channels' member to our telegram channel -- 2

In my niches there are 15ish competitor channels on Telegram that each channel has between 500 to 7,000 members. Total number of individual Telegram accounts around 20-30 K on which over half of the members are duplicate or triplicate. We would like to to invite or add the members of other 15ish competitors channel to our channel. If project succeed we have at least 1 more channel that needs the same thing.