I've never been an fan of cycling with ammonia. I only keep planted tanks, so my original question was "why would adding a lot more ammonia that your tank is ever going to see again be a good idea?", but people could answer that with the <"high ammonia/high pH"> linear nature of cycling. <"I was dubious about this"> as well, but didn't have any scientific argument to refute it.
And, just in case it's not clear, I only use ammonia to get the biological filter established. Thereafter, no further additions of ammonia are needed. Not only that but additional ammonia would potentially kill livestock. Once the biological filter is established, it receives a steady supply of ammonia excreted by fish, etc. and from breakdown of any detritus.