You asked, "What sort of reward could Tulsi be expecting from Iran?"
My guess is that Tulsi hates America and everything it stands for, the way Obama does.
The Iranians are the most implacable America-haters, so it makes sense that Tulsi would find common cause with them.
People like Obama and Gabbard hate the American middle class.
What they want is a nation of peons ruled by a tiny sliver of society that controls all the wealth and power.
The American middle class is the only bulwark against communism.
Stalin exterminated the landed peasants called the kulaks. They were the Russian middle class.
Virtually all were murdered.
Obama and Gabbard want to live in harmony with fellow autocrats.
Since Gabbard is a brainless machine, she's unaware that the Iranian mullahs are incredibly vulnerable.
All over the Middle East, we're seeing REAL uprisings now.
Sudan was the final Beta Test for regime change.
The Sudanese rose up, the army helped, outsiders tried to derail the process, but all sides asked Trump for help.
And it worked.
Gabbard is Obama with his feet up on the desk, or sitting with VJ on the stairs at a White House party; and now those days of ease and glory are permanently over, and all they can do is go back to community organizing which is all they ever were good at.
She is an after-the-fact; she is late to the party; she is playing servant to a man who is not her husband, when she acts as a de facto agent of the mullahs. She will get nothing from them at all. How'll you get home Tulsi.
Those who label words as violence do so with the sole purpose of justifying violence against words.