How does one choose an SMM provider efficiently?

There are hundreds of SMM panels, each offering thousands of services.

Issue is, 95% of those are just reseller panels (and it's getting worse with how every panel is offering a child panel nowadays).
So many options, and most of them are duplicates of one another,
and I'm wondering, is there a way of reaching the actually true service providers? those at the top of the list not reselling other panels but actually providing the services with their servers?

Also, how do you go about choosing a specific service? say Instagram Likes, there are 300 options with different price tags yet based on my testing I think its safe to assume those 300 options come down to about 5 in the backend, what is your way of choosing?

*I hope this won't turn into a simple advertising thread of resellers, but if you have details on actuall providers it is most welcome.

i think in most cases its just a case of trial and error until you
come across somethings that works for you .

Check the reviews and then decide. Some offer free trial balance. Go with them to test, there is no option of loss.

try to try few orders and that they are what it offers, so you will realize

ah mate! these is the point. you shouldn't search for real provider. you need to search for panel who servecheap - qualified service. You know why? Im Spotify provider. You find my panel and use myself service with for 1.5 dolar price. Buy you now what ı sell these service to big reseller about 1.10 and they sell it about 1.20. do you see difference? from provider you will buy more expensive than reseller panel. Thats why you need to focus pn big reseller panel who serve qualified - nonstops service