Hmm did not think about this, but in my oppinion it is not price manipulation. Its more like buying back shares as a company. And it is completely transparent.
One thing I do not understand about this "See DEC in DAO as burned". Hiw is the DAO earning anything of value, to pay SPL for new editions or other tasks, if the DAO cannot use at least parts of its income from these deals?
As I explained in the end, the last sentence of my post, we can. In a distant future with much higher prices when we are flushed in cash, we can.