Adobe said:
STO in turn serve self in an effort to grow in the vibration on STO, so you could call that STS... So, maybe balance is working in STO in an effort to also advance self (STS), and identifying and using the STS/entropy material as tools in acts of creation.
I think you might be wandering off into left field a bit with this thinking.
First, STO is creativity and STS is entropy. A lot is said with that simple sentence if one truly delves into what creativity is - and what entropy is. As 3D STS beings, it is almost impossible for us to truly and completely conceptualize an STO way of being or mindset; it's so foreign to us. We can intellectually, and even emotionally, conceptualize the concept of being an STO candidate, though even that is much more of an inclination - a leaning with the weight of a feather - of an internal disposition; of what is in us to do.
I think you are correct that 'an effort to advance self' is STS, so, it cannot be STO - if you're doing or thinking anything in order 'to get' something, it cannot be STO - so it would follow that this is not part of the STO reality. This, again, highlights our inherent limitations for conceptualizing the STO reality, since to our STS minds, it's just logical to think that one must always do or think things 'to get' something, not simply because that is what is within one to do, with no thought or concern for self or what one 'receives'.
It's my understanding that where we are now, the most we can do is to increase our knowledge, of ourselves most importantly, and of this reality, in order to learn enough to no longer 'fit' here, as it were. Once we no longer 'fit here', we will be able to move forward to make the choice between STO and STS as we understand it to be manifested in ourselves and our reality at that point, a point where such things will be more clearly evident, if only by a matter of degree (I think).
To talk of being STO at this level of reality is to dream - we can't get there from here - but to continue to increase our knowledge of ourselves and this reality (almost always through suffering, effort and paying in advance) is to strengthen what is in us to do - to build that part of ourselves that will be able to choose and that will no longer 'fit here' - what comes after 'here' is, I think, very much up to us - which is where the real work comes in. Just some thoughts - apologies for the length - it's a complicated subject - and this is just my current understanding, which is subject to change!