Python script that can connect with multiple accounts via Telegram API, can scrape members from public groups and send messages via username to the scraped members. To be able to connect only via phone numbers or send messages also via ID then please contact me on Telegram. You can find the link at the bottom of the README.md file.
Why do you think that https://github.com/rashidovich2/TelegramGoodsInbot is a good alternative to TelegramMassDMBot