Telegram Loot deals offers

So recently i have joined liked 3-4 groups of these so-called loot deals offers and the frequency of messages was too high i mean the channel was very active and was sending screenshots and deal offers and sometimes coupons. at first, i thought it was just working for the single website so i thought they were web scrapping or something but then they send other websites promotion offers as well.
so i am confused how are they able to find this? also, most of the offers they share are the price glitched so the products usually are limited or very time-bound so very fewer people really get it, like recently there was this $990 product but loot offer was like $150 and i was surprised but after few minutes it was unavailable.

Are they using bots and web scrapping tool together or what?