Is this spam? Seems like spam to me. Either that or the account in question really likes Powerbreathe.
**Edit**
Yeah, I just went to the website. Copied this:
It is an easy-to-use, drug-free, hand-held device with a comfortable mouthpiece. Within a few days your inspiratory muscles will feel stronger and *within four weeks* your lung function, and ultimately performance, will improve.
Spam!