It's important to note that the names on the patent are Jack Dorsey and Chris "Biz" Stone, not the ordinary staff/engineers at Twitter, at which the IPA was aim

It's important to note that the names on the patent are Jack Dorsey and Chris "Biz" Stone, not the ordinary staff/engineers at Twitter, at which the IPA was aimed. Also note that nothing in the IPA prevents the use of patents offensively if the named inventors agree. In effect, the IPA isn't relevant to this patent, as the named inventors haven't (and probably won't) make a commitment not to use it to protect their business/personal interests.