1. Which first-mover advantages contributed to Tinder's gaining over a million monthly active users in less than a year? In your explanations, be sure to connect the advantages described in the text with the success Tinder experienced as a first mover. 

2. How long can Tinder protect its first-mover advantages? What type of threat(s) can Tinder expect to face first? 

3. How has Tinder monetized its success while its rivals are having to play catch-up?