These rewards relate to the public launch of Storium (which this Kickstarter is funding, and is targeted for November). When Storium launches publicly, we'll give you a nifty online tool to easily invite your (up to) three friends or family. Those people will automatically get one year of MEMBER access! If you chose the TEAM LEADER reward, they'll also get access to every world funded by this Kickstarter!
If you want to invite people *right now*, for the Beta test, that's totally separate. As explained in the prior FAQ, as a Beta tester you can invite whomever you like, and these invitees will NOT count towards your TEAM PLAYER or TEAM LEADER invitees. So go nuts!