@Gabriel
In the USA, mail forwarding isn't a true indicator of a company being a scam, but it is definitely a red flag when combined with other things. Some legit companies in an effort to make themselves look bigger use these services.
~BCX~
Contact Tradehill's PR Director robin at
robin@tradehill.com. Or feel free to contact Jered kenna's assistant
allison@tradehill.com. I spoke with Robin last night, and they are in fact in that building. I will be visiting their office later this week if you would like pictures.
-ZeroBlock