Maybe I missed it but I did not read in either of these articles that the bacteria was self sufficient and would not need some form of feed to survive over time. No, it will not need it immediately but time after time I have experienced " recycling" in established tanks that are overpopulated ( that's not to say too many fish but too many fish too fast) too rapidly after long spans of sparse life in them.
The arguments over what exact bacteria it is that is doing the work has been a fun one to watch over the years. ( I've been at this for over 50 years so I've lived through a lot of the old stories. lol) Does it really matter which bacteria is converting the ammonia/ammonium? Isn't it more important that there just is something in there doing it?
The movement to Beneficial Bacteria only being found in filtering material has also been a hoot. The truth however, is out there somewhere
These are some good articles but not really backing up your theory imo