V-ing modifier between a comma pair (opposing explanation)

Dear RonPurewal DmitryFarber AjiteshArun AnthonyRitz GMATGuruNY IanStewart GMATNinja MartyTargetTestPrep ccooley VeritasPrepBrian egmat, When V-ing modifier is in the middle of a sentence and in between a comma pair, is that modifier a noun or adverbial modifier? According to (…)