You are already extremely suspicious, at least to me, just by asking that question. Why do you need to earn trust in the firstplace? Is not having positive trust affecting you in any way here? Would you mind asking those questions first?
Edit: TL;DR version: I couldn't find a guide on the forum for how the trust system actually worked on Bitcointalk. So thought I might as well ask how some people earn trust.
Well understandably I seem suspicious. I'm just some random on a Bitcoin forum. I get it. I'm just starting to understand how Bitcoins work and stumbled across this forum.
I'm assuming you want me to answer the questions? I didn't really understand what "trust" is on this forum. It seems like people have it only if Bitcoins were risked with you. I wanted to see if people ever earn trust without holding on to people's Bitcoins. In all honesty I wouldn't trust anyone with escrow. I don't really care about how many Bitcoins they've escrowed in the past. It just seems like this is a currency where you can't trust anyone because it's irreversible. Just because some has a magical title of ultra super magic man just means... they post a lot. Which clearly means nothing. But if someone has trust it just shows you're an actual good person and you've proven it. That's what it seems to be anyways.
Is not having positive trust affecting me in any way? Nope. I'm a very trustworthy person in real life so was wondering how someone would earn trust on a forum where you never actually meet these people in real life. To me it seems like a place where I wouldn't ever completely trust anyone. There's absolutely no way to get back anything you've sent.
I guess I was just wondering because it's something to aim for. Like I said, I'm never going to borrow. I won't ever have that need. If I did I definitely wouldn't ask people on a forum for money.