Interesting thread. Note that the rules vary from place to place. I happen to have an aerobatic endorsement from my country of license origin; that gives me a legal 'deck' of 3000agl; any lower requires additional waivers/authorities.
However, in the UK there is no aeros endorsement - as I understand it, there is no special requirement for aeros, other than the requirement for not over a built up area. The usual 'land clear', and 500ft rule apply. Sidenote here, the 500ft rule does *not* say 500ft above, it says 500ft clear - by my understanding, technically that *could* be 500ft laterally, and 1ft off the ground - if you're very sure nobody is within 500ft, you're technically OK. I consider that more a curio though - 500ft is plenty low enough, in fact, as far as I'm concerned, the 3000 deck is just fine..
I don't have the first idea how the DA requirements are worked, nor do I especially care. Aeros for me (the pilot) is just as interesting at height, and a sight less likely to become terminal; I have spun (a glider) from well below 500ft as a checkout exercise - it's a very very different experience I can assure anyone.
To the OP's question, Yes, and YES - in this case the rules and regs are a bit of a side-matter.