GI JOE SKY STRIKER JET DOES NOT ACTUALLY FLY
Personally I like to know when somebody is acting as a paid shill. In that vein I feel my endorsements - at this time uncompensated in any fashion (DistroKid, Ernie Ball strings, Agile Guitars) - have value. I speak from personal authority, not because somebody cut me a check or sent freebies.
I'm not a big spender, so I try to treat my public endorsements as genuinely worth something because if I'm willing to pay for it myself, and I believe in the product, then that's what the point of talking about things is in word-of-mouth business! If I get an opportunity to "test" something without paying, I'm going to disclose that right away. It just feels...ethical...Every once and a while I watch the Aqua Teen Hunger Force episode "Boost Mobile" and soak in the delicious mockery of celebrity endorsements. YMMV.
Or, for any who think the FTC is maybe over-stepping a bit, let's consider the other avenue that gets talked about as a "First Amendment" adjacent issue: Astroturfing.