When I first signed up for Sampler, I found it a bit confusing. The website guided me through answering some demographics questions, but then didn’t do much else.
As it turns out, the companies that send out the free samples reserve them for people of certain ages/genders/locations, etc. So you might read about a freebie from them but then not be able to access it yourself.
My suggestion to you is that you sign up and tell them about yourself and provide your cell number so that you can be advised by text message when a new freebie becomes available.
I recently received a free sample of Persil laundry detergent from them, so it does work.
And let us know what you get!