I did not say its useless- I said its waste of money. Ipamorelin does same thing that GHRP-6 and GHRP-2 do at smaller dosages- so instead of using Ipamorelin he could used 70-80mcg of GHRP-6, effects would be same but it would be 3X cheaper.
Reason why Ipamorelin does not cause prolactin/cortisol release is because it simply cannot stimulate pituary that much.