Some would have said the ACA series was a holy grail
Until Jens did 3 different batches of cards! (Well, 4, when ACA520 comes...)
The first two sold out in just a few months, and likely the 1231's will be sold out too
I'm pretty sure the ACA520s will all find a home too.
I really see the dev costs for the board of an 'ACA1260' as roughly equal to that of ACA1231. There might be complications but they're on the same playing field. I'm guessing now.
As for batch counts, I can only guess from what 3-4 webshops can buy in a year. Say 100 ACA630, and 200 each of ACA1230 and ACA1231.