Depends on cost benefit. 

Do I already know them? 

Does the game seem really good, but with a few holes I just can’t get past? 

Is there a webpage or community do a quick check with before I try to overcome the existential crises of the post-human condition and make a bullshit connection like some character from a shit terrible Wachowski show? 

Have I heard other people report on it well? 

Blahblah. 

All of which is to say, I’ve done all of the things on your list with different games. It all depends on how good I think the game could be, how much work it would be, and what the existing network is like. 

Oh, and when I have reached out, it’s been all over the board. Sometimes I’ve made friends from it, or ended up playtesting new editions, or shit like that. Just as often I’ve come to understand how fallen and stupid humanity is.