Another mod, or Eve, can correct me if I'm wrong on this, but that rule is primarily based around the mention of other SIM games like WP or its sister sites to prevent promoting of other games and/or inviting players offline, which WP can see as predatory and unsafe. Social media's are allowed to allow others to connect with each other, should they become friends. Finding others offsite isn't recommended, but some people do like to keep in touch past WP, lest they end up never logging in or they enjoy the conversations they've had with another person. We have to credit all images used, and as Deviantart is a site most would turn to for art, it is allowed, seeing as it isn't another 1. Roleplaying based site (yes, I know people CAN use it to roleplay, but that wasn't it's primary intention for creation) and 2. A Sim game for others to meet on.