It's in a thread just like this one which goes on for page after page after page.
Basically he said the local fishermen know the spawning grounds, they also found lots of other spawning grounds, they sell to middle men, who keep them in big tanks. Some years they have boom years while collecting fry, so times not. The collect them really really small, so the numbers are high. The last few years have been particularly successful. To the point the middle men, or "farms" wont buy them. They then sell them in bulk.
With regards to ST or Indo, I couldn't really comment, I would guess those scientist would practice slicing open cheaper fish to understand the anatomy of pulcher before moving on the the expensive ones.
Evidence is pointing at it being NOT commercially probable and it always has been that way. Evidence doesn't need to be provided of fish being wild caught, but fish being captive bred because based on the past evidence it is not yet probable.
I think the NTT pictures which Thaiho posted are further evidence of scientific breeding programmes.
The was another Thai guy who was adamant the dats were bred, but he could never produce evidence to back up his claim. Everyone is on the case, form the amateur hobbiest to country funded breeding programmes. Big money involved you see.
It will happen, but you will also know about it when it does because it will get splashed across ever forum and every fish keeping magazine.