1. Mods released are in the public domain. If they never wanted it in public packs then they should have never released it.
2. Their copyrights/licenses are illegitimate, and unenforceable through court.
3. People would ask for permission if a large portion of mod makers would let go of there egos, and quit being jerks.
4. What you and curse are trying to do will land in hot water with Mojang as it will be against their EULA. The whole you can't make money off of Minecraft in any way excluding Youtube.