Cost per acquisition advertising (e.g. TalkLocal, Thumbtack) addresses the risk of CPM and CPC advertising by charging only by the lead. Like CPC, the price per lead can be bid up by demand. Also, like CPC, there are ways in which providers can commit fraud by manufacturing leads or blending one source of lead with another (example: search-driven leads with co-registration leads) to generate higher profits. For such marketers looking to pay only for specific actions/acquisition, there are two options: CPL advertising (or online lead generation) and CPA advertising (also referred to as affiliate marketing). In CPL campaigns, advertisers pay for an interested lead — i.e. the contact information of a person interested in the advertiser's product or service. CPL campaigns are suitable for brand marketers and direct response marketers looking to engage consumers at multiple touchpoints — by building a newsletter list, community site, reward program or member acquisition program. In CPA campaigns, the advertiser typically pays for a completed sale involving a credit card transaction.
So, why should Facebook bots matter to marketers? For starters, Messenger has 1.3 billion monthly active users. And since bots are a form of artificial intelligence, their natural language capabilities will undoubtedly get smarter over time. From the perspective of the customer, bots make the shopping and customer support processes much smoother, eliminating the need to scroll through pages and pages of product choices or talk on the phone with a customer service rep. In fact, a HubSpot Research report found that 47% of people are interested in buying items from a bot. Facebook Marketing For Individuals - How to succeed With Facebook Marketing