These days we find a lot of spam bots in Twitter, both blindly sending unsolicited direct messages to other users or doing some previous semantic analysis. These bots are usually easily identified and promptly shut down by Twitter, but they are recreated again just as easily. For a given campaign spamming porn with more than 5000 active bots, they were creating 250 new ones a day. For some campaigns the half-life of the fake profiles is as low as 45 minutes. Many companies offer this service as?digital social advertising”]
Source: https://securelist.com/is-digital-marketing-the-new-spam/66950/