I think the most relevant issue here is that we already have a convention which we adapt to this problem.

If I had $1300, I might say I have "thirteen hundred dollars" or "one thousand, three hundred dollars".

If, though I had $2000, I could say "two thousand dollars" or "2 grand" but never would we say "twenty hundred dollars". That would be silly.

We do, once it gets to 2100, get our pattern back. So saying "twenty one hundred dollars" is only as fair as "two thousand one hundred dollars".

So twenty ten is just silly.

I've been shortening it to aught (x) for the last nine years but much like the others here doing the same, had very little luck with understanding from the general public.