If you want to access trade's profile of someone, the easiest way is to find one of their (active or old/ended) giveaways, if you can - e. g. through the forum you can browse the person's "latest activity" or "postings". If you do find a giveaway by that person, you have practically won the fight - just follow the guide here
My gripe as of late is 1) Very difficult to get correct link for banning users from giveaways They should just require everyone to link to valid / level capped Steam Users and use that instead. 2) Rampant abuse that makes the banlist almost useless. I feel as though 25 total bans at my current...
forums.indiegala.com
If you cannot find an old giveaway, you can try Google (or other search engines) and type in something like "indiegala cheerie132 2-dot-indiegala-prod appspot" witch the name of the user - if you're lucky, Google will find some old giveaway for you, so just follow the guide I linked above from this point on.
If you can't find a giveaway even like this, I'm afraid that's the end of the search
