My comment states that the buttons don't appear for me (and I don't have a twitter account anyway). I don't see anything wrong with viral mechanics (for example, I'm very impressed with how dropbox does it).
I'd feel more comfortable if this price was stated upfront, before harvesting my email. As it is, it seemed that giving up my email was the "price".
I'd feel more comfortable if this price was stated upfront, before harvesting my email. As it is, it seemed that giving up my email was the "price".