First: It was never used in any legal high products (probably because it came after the "analog ban" and it's somehow new) . But I'm pretty sure its an abused substance and probably sprayed on cheap cbd weed and resold as real weed (shocker, weed ain't real? Oh you would go crazy if you knew that almost all drugs got already replaced with "legal" analogs and people get ripped off when they buy it for those high prices).
Second: Those prices are ripoff, 5mg for over 100$? You can get that stuff from spanish and dutch resellers for like 1$/g and you can get from China 1kg for max. 300$ (shipping included). I never checked India but I'm sure its even cheaper than in China.
Anyway let's be real here: Yes it is a good insecticide (tested it myself and it will keep mosquitos away) but as you probably guessed it's not why I'm looking for it Where I live there are no traditional drugs anymore:
Cocaine got replaced by legal benzo cocaines (eg. Methylenedioxypyrovalerone)
Heroin got replaced by some fentanyl analogs.
XTC got replaced by Methylone, 3-MMC and other mixtures.
DMT, LSD got their own derivatives.
And sadly our good old weed got replaced by noids. They buy cheap cbd budz for less than 1$/g and sell it to you for above 10$/g (each gram has max 1-2mg of the synthethic noids on it). They do it because its less risky to smuggle 1g. And 1kg CBD-Weed is legal anyway.Only education can beat the war against drugs.
If more people knew that they basically get cheated and that their drugs are actually legal analogs, they would stop buy it for those ridiculous high prices. You get those noids for less than 1$/g which have 500 - 10'000 dosages per gram - depends on the noid eg. THC has "only" 50-100 dosages per gram.
There is a good vice documentary about it: "Why are drugs so expensive?". The only reason this works is because people don't know how they get cheated.