More than a decade ago, when forums like this were rare or not supported/existing for my part of the world, you weren't able to just read a review about a vendor and then be sure if it's a yay or nay.
So if you were lucky enough to find someone after hours and days of searching, you just had to trust what that people were telling you. And if you decided to do so and actually placed an order for a generic supplement you've never heard the name of, from a (mostly :lol: )sketchy dude from a foreign country, you never knew what you'll get in the end of the day(or if you even get something at all).
I've had a lot loose vitamins which then came out to be just pressed milk-sugar.. or supps with no imprint, bad shape/pressing or they were just plain,white and round(my favorite...

) without ANY kind of identification mark. So if this was the case, for me, the risk was too high and the products went straight down the toilet. People can put any kind of shit in p1lls and tell you that those "are the best around" just to make $$. But if you can't be sure about the actual ingredients, you generally better leave it(at least that's my philosophy on safer use)...
And that's why I preferred bl1s3red packaging. Even if a supplement has no imprint or other identification mark, you could take the info from the bl1ster, search it up and at least compare the original vitamins and packaging with the product that you received. Also there are batch no. and manufacturing/exp dates on them.
So if the products you received had the exact same measurements, color, shape, bl1ster design(and so on) as the original ones you looked up on the manufacturers site, it got you a big step closer to be sure that you received the real deal and didn't get scammed...