Arent these all prohormone type supplements?
Yes.
Outside of the legal and pinning element, if you want more testosterone in your system why not just take testosterone? This stuff looks to be more expensive and less effective than the "hard" stuff.
And this is where you need to learn at least a bit about what you're talking about before you open your mouth.
1) I already covered legality. It's a DSHEA-compliant product, considered a dietary supplement by the Federal government, and chemically very different from testosterone. Sure, it's steroidal -- but so are phytoestrogens sold as "plant estrogen", DHEA, and even the hair loss treatment Propecia. "Steroid" =/= illegal.
2) It's not about "more testosterone". Testosterone has an anabolic:androgenic ratio of 1:1, because it's the reference standard. Orals have a greater variance in these effects, allowing more tuning of the desired effects vs. unwanted sides, to an extent unavailable even with more 'exotic' injectables. For extreme anabolic effects I can inject trenbolone acetate, suffer severe progestagenic side effects and even worse androgenic ones, all while committing a felony, or I can take oral methasterone and only have to deal with hepatotoxicity and HPTA suppression.
2a) In this particular case, Adrenosterone is known as an extremely mild cutting compound, with very minimal androgenic side effects and no real impact on either the liver or the HPTA.
3) Adrenosterone is not injectable -- it's orally bioavailable.