Here's the thing about those OTC hearing "Aids" which I believe will be a blessing and/or a curse. Like anything in the electronic industry, improvements to be improved upon products that exist in the Hearing Aids for medical purposes.
For those who can not afford the Real thing. True nothing can replace a 7K pair of medically approved hearing aids. Will those OTC have, firmware updates, bugs, glitches. Will they cause more harm, sure cool in helping those with impaired hearing.
Also since it's a product that will come in contact with the ear by being placed inside the ear canal. What type of return policy? With infectious diseases on the rise just from breathing. One can imagine trying to return a product that's already been used, placed inside someone's ear.
Fluid can leak into the ear canal, contamination will have to be taken into consideration.