A bot for cold DMing users, automated follow-ups if no answer, timing the outreaches (avoid burning acct). If answer a bot replying to QA and possibility to switch to live agent. Multi accounting with proxies, agent accts manageable from one place. A simple CRM with statuses applied.
With an option to use different variations of text and metrics on open rates etc. So you can test what works and what not..AI implemented to create different versions of text (avoiding TG limitations). Do that and you got customers