Source @shodanhq via twitter: https://twitter.com/shodanhq/status/932767613423415296
If you're in Security/Analytics you won't require an intro to Shodan. For the others, here's a brief description from Wikipedia:
Shodan is a search engine that lets the user find specific types of computers (web cams, routers, servers, etc.) connected to the internet using a variety of filters. Some have also described it as a search engine of service banners, which are meta-data the server sends back to the client. This can be information about the server software, what options the service supports, a welcome message or anything else that the client can find out before interacting with the server.
Original Tweet:
Yes, we're having a black friday sale :) $5 Shodan Membership instead of $49 and it will run from Friday through Monday.
Starts Black Friday in the US, so probably Late-Friday (24th Nov) Evening and Saturday (25th Nov) here.
Just an FYI - if you have an academic email you can get a free upgrade.
For those without, this is a great deal.