It wasn't an early bird discount so much as a "thank you" discount for those participating in the discussions and polling that influenced the product definition.
Unfortunately those codes often didn't work, subsequent no-code discounts came and went with no warning or deadline, all while some of us were waiting (and continue to wait) on some resolution to the obvious shortcoming of a 5A power supply for the A7 models.
In hindsight, perhaps I should have ordered the A7 when the 15% discounting was functioning and found my own 10A power supply.
3e audio confirmed that there would be no discount codes on Audiophonics..... that's really bad
Anyway I have ordered two A7 Mono units, they shall arrive on Monday 20th
Note that from Audiophonics the A7 units are coming with a 480VA power supply unit:

3E AUDIO A7 Amplifier
3E Audio, a recognized player in the DIY world, now offers a Class D Stereo amplifier incorporating audiophile Hi-Fi components. The A7 amplifier is based on two TI TPA3255 chips in PBTL configuration, and two dual OPA1612A OPAs.

3E AUDIO A7 MONO Amplifier
3E Audio, a recognized player in the DIY world, now offers a Class D mono amplifier incorporating audiophile Hi-Fi components. The A7 Mono amplifier is based on one TI TPA3255 chips in PBTL configuration, and a dual OPA1656.