Does the "like/tweet/pin us to even try our product" appeal to a large group of people I'm not aware of? My initial reaction to these tactics is a mix of "Gee they must not think they're product is very good" and, "Oh, fuck off."
It's asking for a personal endorsement (one of the most valuable currencies at my disposal in the information economy) of something I do not yet have the option evaluate. I was really excited to try this, but I'm not going to. Ick.