FACEBOOK MARKETING TOOLS

Do not use TOS-violating tools: Any act of buying and selling accounts, creating spam, scraping data illegally or automatically creating a series of interactions can easily cause accounts/ads to be checkpointed or banned. Meta is tightening control. (I repeat because you asked about buying accounts before).
Prioritize tools that directly integrate Meta's API (such as Meta Business Suite, official partners) to reduce risks.
Test each small function before deploying large-scale automation (e.g. comment reply bot, auto-boost) to observe Facebook's reaction.

I did bot at big scale facebook and it's working fine for me