If I sourced all those ingredients and took the time to get them into the same ratios as Strive, that would end up being more expensive, in terms of time and money, than if I just bought Strive. I don't have a lot of time on my hands so I will pay for the convenience, but for someone who does have abundant time..hey, source it out and mix yourself silly. It won't end up being as good though..believe me. I have tried to re-create all the top PWO et al.
Same argument came out when things like Body Octane etc hit the market. Someone like Omega Sports or MAN come up with a synergistic blend, which takes $$ in terms of R&D dollars, not to mention the flavoring which means all the world to a huge share of the customers.