Scambots

Scambots (also known as porn bots, fake bots, or simply bots) are bots that are automated for conversations with people to give offers to people. The offers can vary from "Cams", to game/app offers in exchanges for reward (usually nudes).

Overview
Their often on popular social media, such as Tumblr and Skype. They often pose themselves as women who are looking for sex, and often ask users if they want to see whats on their cam. what the bots do vary on the site.

Tumblr
Tumblr bots often follow users on their blogs. They often have pictures of porn models on their profile picture

Skype
They often send users friend requests which once accepted, they start talking. Most bots offer to see their cam, which is (for the most part) a scam.

Tinder
Tinder is infamous for bots, bots on their are mostly the same as Skype's bots. Most competitors of tinder use tinder's infamy for bots for advertising their site.