The people who watch him are EVE players. I can't imagine that there's much crossover with Hawken players.
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But let's not pretend that this particular Streamer's going to contribute significantly to Hawken's population by playing thousands of hours of EVE.
I disagree and heres why.
The people that watch him regularly are the people that enjoy being entertained by him for whatever reason, the game any streamer plays has very little to do with things once you cross a line and become a regular viewer. The new people that show up mid stream do FIND him because they are players of whatever game he's currently playing, but not his regulars. If the new arrivals like what they see and enjoy it they might stick around and watch regularly. I think you are trying to put the focus on the game, and watching a stream isn't about the game, its more about the engagement with streamer. You find the streamer by the game, yes, but once you've found a quality streamer you enjoy watching, the game they play becomes irrelevant.
I think you are overlooking the fact that no matter who is streaming, a number of their fans will follow them and play whatever game they are currently playing.
I've seen it happen in Docs stream, people that normally only play MMO's would even stop watching and play Hawken with Doc. Enough people to make sure his server was always full during his stream. The question is, did or do they play even when the streamer isn't playing that game live. I think that depends on if people actually find the game enjoyable, and we all know how enjoyable Hawken is to new players.
I myself have purchased and played games I normally wouldn't of strictly because of a streamer or Youtuber, for example I started playing Don't Starve cause I watched x9x8x7x play it on stream a few times. I also started playing Binding of Isaac because of another streamer that I watched because of Don't Starve. I can go on and on with my own personal examples.
I think you are greatly underselling and ignoring the influence that the streamer has in advertising any game both directly (on purpose and getting paid or something in return) and indirectly (by just playing it) , no matter what their viewer base was created on.
I wish Josh and Tiggs would produce the results of if their experiment with the streamers was a success, failure or it broke even, but one thing you cannot deny some of those players you labeled as strictly EVE players did download and play Hawken. I'm sure it had the same results as the rest of the people that played Hawken a few times and didn't stick around though, sadly.
If the focus is on getting a damn update up, then you'll see people playing.
And Elite, the game is going to need quite a bit more than just some new content. You've got to be a little more realistic and look at the bigger picture. Yes, content can bring some people back, but it won't keep them around for very long.
Its going to need an uninterrupted string of content for a long time, to keep people interested, or it will be just like when the news hit that Reloaded purchased Hawken. Some players will return, but they will quickly get bored and go on to other more interesting games.