https://forums.d2jsp.org/info.php?c=4"Below are the official rules of the Trading Ground forums. Please note that these are in addition to the global Site Rules, which also apply:
https://forums.d2jsp.org/info.php?p=9";
https://forums.d2jsp.org/info.php?p=9"Interpretation of rule violations is up to the sole discretion of the d2jsp Staff. If something is borderline, such content or behavior is strongly discouraged."
^Some d2jsp staff might agree with you and some may not. It's not like you got a 15min warning for it or anything.
Personally, a gfx swap is a trade because you are trading an item for a different item. This mattered way more in the past when unperms existed. A service would be a Grush, level job, chaos or baal runs, or killing ubers or Dclone for others.