If you get out of this with 2 neutral tags and no negatives, I'd say that's not a bad outcome for you.
I second this, OP. I wouldn't be too worried about your trust page unless you wind up tagged by a DT member (and I haven't checked the list lately, but logfiles's trust gives you an red -1 when I see your avatar). Lots of members have gotten brutally trolled on their trust pages and have pages full of red--though in those cases, it's never by DT members. But my point is that nobody would really care even if they were inclined to look at your trust.
Even bounty managers seem to overlook valid negs given by DT members occasionally, so I wouldn't worry about those two feedbacks you've got (which I suspect will probably be modified if you follow up after some time has passed with the members who gave them to you).
Why would you just wear a signature of a company you have no idea about? It was careless from his side.
I think most members who join new signature campaigns/bounties do exactly that, and personally I don't fault them for it. If a project/exchange/casino/whatever is new, it's extremely hard to do due diligence prior to joining. By the time you've figured out if the place is legit, all the spots are taken. Plus, isn't it better to assume that something
isn't a scam until proven otherwise? Unless it's obviously one, of course.