If you restore your wallet in Electrum as a "2FA wallet"... it supposedly re-creates the wallet with 2 of the 3 private keys for a multi-sig wallet on your computer, so you no longer need to use TrustedCoin.com to sign transactions. (This is the recommended "recovery" method if you lose your phone, no longer want to user TrustedCoin or TrustedCoin goes offline etc).
I'm unfamiliar with how these crowdfund things work... but are they asking that you provide them with a private key? If so, that seems incredibly sketchy...
Why exactly do they need your private key?