As a seller, I am guaranteed to get 10-20 scam messages in the first 24h of my post on Craigslist; text, email, and phone. God forbid you were bold/stupid enough to put your real information in there. You have to use burners or congratulations, you've signed up for a lifetime of scam calls.
Facebook Marketplace has many faults, but it is relatively easy-to-use, has a wide audience, attracts more serious buyers in my experience, has low spam/scam volume, actually attempts to address scammers (albeit cumbersomely; this is still a differentiator from CL) and allows me to know something about who I am trying to make a deal with.
Marketplace is succeeding despite its faults precisely because the other options are generally such terrible experiences.