to go against all odds of what has been going on in this forum page (presumably) I have to side with rockstar.
Modding GTA IV was indeed fun and very very different from GTA V (as it is online and the misfortune of a ban comes with leaving mods on)
it is sad to see OpenIV go, and to be honest, maybe not even needed. but I still see how Rockstar is mostly in the right.