It's not against the rules to have a conversation with your shoe company rep. What statement in that text constitutes a violation? You are ASSuming (as is the ncaa) that the next step after that conversation was for the Adidas rwp to pay a player but that text exchange does not refer to anything that is specifically against the rules
Nothing directly in that conversation was a violation, but that conversation moves the shoe rep from just being a shoe rep to a booster pushing that specific school.