Fire & forget isn't polite, and will be considered spam. Posting your own site or work is OK in moderation, but please contribute to the community too.No abuse, threats, harassment, hate slurs etc.
Of course, the exception is published information that the person has chosen to put into the public domain. r/Genealogy Researchers Genealogy Resources
If you are looking for specific help on a specific region, this post has a list of people willing to help with searches and lookups regarding certain areas.