I think you should enter in signature campaign , you can earn more bounties , more tokens , more coins etc
The requirments for the social media camapign depends by each campaign , but generally , you must have more than 100 friends on both ( facebook and twitter )
I'm not really sure if there's a signature campaign that still accepts as Newbies - Jr. Member. If yes, then definitely he can join to bounties earn btc/altcoins.
What is a social media campaign? It's a campaign for social media for example is twitter and facebook. If there is a new project that's going to open and ofcourse all they gonna do is to promote their project thru facebook and twitter to increase their exposure. Uhm it's like you're going to adverise their project to your facebook or twitter account.
Can newbie join? It depends on the rules of the project some project accepts only jr. Member and above but there are some that they just accepting people with 500followers and above regardless the rank in bitointalk forum. You can read all the rules and regulations including how you will apply and the payments at the first page of the projects thread. I hope this will going to help you and also welcome to the forum
Very good definition of social media campaigns. But you need to have a lot of followers lets say in twitter, and not just bot but real followers. And its better if your account is crypto related, so that the one that you are promoting can reach their target audience. As for me, I haven't joined one because my account is purely for personal use. Goodluck!!!