People get caught up in the social media presence PBR has. The more kids they are pushing on their twitter, the more coaches tune it out. If every Joe and John has their 82mph fastball on the twitter feed it essentially becomes another email in their inbox that they breeze past.
The coaches that liked and followed mine on twitter after PBR posted was because they had that tweet passed along to them. No different than a travel coach or a baseball guy advocating on your behalf.
In looking at the social media for PBR in my state, it's almost entirely commitments, rankings, and upcoming events.
If you want to do PBR do it because it's a good, mostly affordable way to get your velocity measured or get some swings on film. Don't do it expecting their tweet to get you an offer.
PBR is not much different than PG. They are just in the earlier stages, give it 4/5 years. Showcases will be in the $600 range.