Why are we flamed for theorising a particle with no energy and no mass (even then, only in the string theory, which is a minority belief) but it's OK for you to have a particle that sounds like it's from a Phillip Pullman book that acts as an eternal accelarator, which is disproved by the Theory of Relativity you flaunt so much.
Assuming dark energy has and expends some energy propelling us up, otherwise it would share the exact properties of a graviton, which is
imaginary mystical stuff
, so what happens when it exhausts the supply? Where do they come from? (You people seem to have given me the idea of a hole in the nothingness with billions of tiny particles spilling out every second, which isn't possible as matter cannot be created or destroyed through a chemical reaction, assuming it is a chemical reaction, but what else could it be?) Do they ever spill over the edge?
Answer all the questions with a logical answer, if I ask again, you haven't, and "Read the FAQ" is banned from all answers. Anyone who breaks these simple and easy to follow rules will be beaten to death with a flaming plank. (Not a metaphor, but literally, a plank which is on fire, for you FE'ers.)