Ok,
1. No developer version for "entry level devices".
(No list provided yet.)
2. Developer version to be "restricted".
Which means what, only a closed version, no public ones?
3. Developer to be provided at least one year for each device released, after one year - only as needed, and as resources permit.
3 months notice will be given before terminating the developer version.
They are correct that many are using the developer as a better stable - that is my experience.
This is my interpretation via Google translate, i.e. I am not Chinese.