You get a ‘private message’ from some user. S/he posts their email address, and advises that s/he needs to speak with you privately.
This is one of the ways scammers get your email.
If you are really ignorant or innocent, you might shrug. If you know anything about scammers, you’d have deleted that PM as you saw it.
Getting your email address means you can not merely be used as a begging bowl and a stooge, but your email will be used to join various other sites.
There are people who never joined X but get messages from X …
“We are closing your account due to your harassment of….”
“We have reported your account for….”
And when your email account is Closed because of…. you are sitting there saying; “But I never….”
Write it down….Never use your real email address ever to respond to anyone or anything you don’t know. EVER.