Facebook testing News Feed-like ads inside Messenger. It’s not really irritating right now, because the ads is shown only under the “Contacts” feed and launched for a small test in a couple of countries, but it shows Facebook’s intentions to bring businesses directly to Messenger where they customers are. We’ll see how will it be connected to the bot platform, whether they’ll allow bots to natively send ads to users. Maybe it’ll be the first official way of monetizing bots by the way :)

https://thenextweb.com/facebook/2017/01/25/facebook-testing-news-feed-like-ads-inside-messenger/