I don't use any of them. I trust real chemists, biologists like the folks posting in this thread (and beyond) who have said as much. It is really easy to google what some of them have posted... like the environments needed to survive and how the populate and how none of this is conducive to living in a bottle while some of it is.
These are my thoughts... In general, nothing in a bottle is any good. If you need to dose, Dr RHF has written an article on it and you can buy food-grade things to make your own supplements out of where you know the purity and stuff. Ecosystems can maintain the right amounts of bacteria and they do not need dosed on the regular. Fish/invert gut bacteria is more complete than what comes in a bottle but there is no jump starting this. Once you have a fish or a few gastropods, I don't see the need in even dosing nitrifying bacteria. Beyond fish gut bacteria, something out of the ocean that has been kept in water like a rock or frag on a rock or clam shell can introduce more microfauna and bacteria that you can ever get from a supplement.
Lastly, the manufacturer cannot be trusted for ANYTHING. There are probably some good ones, but the liars and misrepresenters have ruined it for them all. Most hobbyists that are not biologists or chemists are also not really great at these things, either, only they are not looking to deceive you like a manufacturer is... they mean well, but just don't usually know.