$5 bonus is coinbase account registration referral system
however i didnt see option or list of altcoins which can be used for the service
Thanks to ShapeShift we accept: Bitcoin, ArchCoin, BitCoinDark, BitShares, bitUSD, BlackCoin, Clams, Counterparty, Dash, DigiByte, DogeCoin, FeatherCoin, FloinCoin, Gems,
InfiniteCoin, IOCoin, IXCoin, LiteCoin, MaidSafe, MasterCoin, MintCoin, MonaCoin, Monero, NameCoin, NeosCoin, NovaCoin, NuBits, NXTCoin, PeerCoin, PositronCoin, PotCoin, QuarkCoin, ReddCoin, Ripple, ShadowCash,
StartCoin, StorjCoin, SwarmCoin, TetherCoin, Unobtanium, Vericoin and VertCoin.