1) What is the author's understanding of convergence culture?

He says that, "Convergence is a word that manages to describe technological, industrial, cultural, and social changes depending on who’s speaking and what they think they are talking about."

2) What is your understanding of convergence culture? What can we learn from the media history?

My understanding is that cultural convergence is thats its basically saying that old and new things from across different cultures come together to make something new. Like the OBEY symbol using an image of Andre the giant. In specifically media convergence we can see how a lot of old tech ideas are coming back because we can now actually build them. Like Apples smart watch or Marty McFly's hoverboard that's had people baffled for years. 

3) How are the participators engaging? 

They're engaging over new means of media and technology, however some have a greater advantage in that they don't all have access to the same tech.