They begin a game and then start asking where the women live and whether they are married and want to continue chatting via other messaging apps such as WhatsApp.
It is likely many of them are romance scammers.
Scopely said the chat function could be restricted to friends only.
One woman, who is in her 60s and lives in London, told BBC News she was contacted via private message by two or three people per week, all claiming to be men from the US.
She did not wish to be named.
"It's almost like a script," she said.
