api... inequality?

So there used to be lots of slightly crackpot-esque threads about private listing/indexing apps that were faster than poe.trade and later pathofexile.com/trade, and the concerns/claims were usually written off due to a number of uncontrollable, unmeasurable variables, not the least of which was the fact that you couldn't tell whether the item actually sold or whether the seller just took it down after getting barraged with requests.

this last issue no longer applies--items on async are locked, and if it disappears it's sold. i invite you to watch the following listing: https://www.pathofexile.com/trade/search/Keepers/6z8kmeWqIG/live this is a fun one because it falls firmly in the venn diagram region between things that people don't know wtf they're looking at and things the common trade macros doesn't parse properly. this thing gets listings regularly, once every 10-20 minutes depending on time of day. i'll admit my reaction times aren't what they used to be so after i failed to get the trade 5-10 times, i set up an autoclicker, yet across 30+ listings ive never a) teleported b) been told the item was in demand and would i like to teleport. it is always gone before i clicked (0-100 milliseconds ago). it seems improbable that every example was on a different gateway (though i obviously have no way to confirm that), nor that gateway latency would create such a large disparity to avoid the 'in demand' prompt.

so where does one find an actual realtime indexer that consistently beats /trade by multiple seconds... asking for a friend (/s obviously; the real question, as always, is why does this exist like this?)