The guidelines for getting an upvote from the @steem-ambassador account can be found here

All Steem Ambassadors voting behaviour can be analysed easily using some of the cool tools in the ecosystem. We always recommend doing this, and it's important to hold Steem Ambassadors to account.

What I would say is this. @starlost has in the last 30 days upvoted on over 420 different accounts.

This in my mind does not reflect someone upvoting only their friends. It tends to suggest a wide voting pattern.

Perhaps there is a problem with needing more Steem Ambassadors who can curate Indonesian language. If this is the case, then feel free to stand. Guidelines for applications are on the promo-steem website.

Steem Ambassadors will not upvote content which they do not believe to be high quality. Nobody is entitled to an upvote from @steem-ambassador unless they get a minimum of 3 upvotes from Steem Ambassadors. So if we need more who can read indonesian, then that's fine. We take it seriously, and the community can be assured that we want it to succeed.