How do sites like ImportYeti allow you to see your competitor's suppliers? It's so cool but it seem

Hi All

I'm new here and also just getting started as an Amazon FBA seller. I found a free tool while browsing Reddit called ImportYeti (https://ift.tt/3erKaII) that allows me to see the suppliers for my competitors.
Any ideas on how tools like this get their data? It seems too good to be true.

from eCommerce https://ift.tt/2DLS8ji
via IFTTT