For a number of reasons, I have decided not to attend the December 19th "debate" — regardless of whether or not there are qualifying polls. I instead choose to spend that precious time directly meeting with and hearing from the people of New Hampshire and South Carolina.
I am not sure Tulsi would have made it to the debate anyway, she is still one qualifying poll away but it is interesting she mentions South Carolina. While it appears she has spent extensive time in New Hampshire, she has spent nowhere near as much in SC--as best as I can tell just a few events.

She must see an opening there to bring it up in this tweet.

She is polling at 5.0% in New Hampshire, if she can pull that off in South Carolina, the media won't be able to ignore her. Currently, she is polling around 1.5% in SC. But will Super Tuesday come up to fast after the SC vote? She is only polling between 1.0% and 1.5% in Super Tuesday states.

The New Hampshire primary is February 11, the South Carolina primary is February 29. Super Tuesday is March 3.