When two users have matched, a new button will appear at the top right of the chat screen which resembles a blue video camera.
They are almost always 25-26 years old.
They will not appear in your feed anymore, and you will disappear from theirs.
In another cases, bot script are used to create fake profiles and to talk and match on the site.
Scammers often will not take the time to write out a lengthy bio.