Smoked Meat Stabilizer is used in smoked and cured sausages (i.e. snack sticks, summer sausage, etc.) only. You do not want to use this in a fresh sausage, and not in a cured product that uses a brine (i.e. ham or turkey).
You could use it in other smoked and cured sausage like a german, polish, kielbasa, etc. Most commonly would be snack sticks and summer sausage though.
Usage is at 2 ounces per 25 lb of meat. (measuring per pound is 0.08 ounce, which is really hard to measure for individual pound increments, so hopefully you are making a decent size batch)
It does not add smoke flavor. “Smoked” is in the name just because it is used for smoked and cured sausages.
You can use smoked meat stabilizer in place of ECA for the cure accelerator properties. It would not end up with the same level of tangy flavor that ECA provides though. If you add both, it might make things a bit tangier though, since smoked meat stabilizer has some ascorbic acid and sodium citrate in it. I will try to find out exactly what to expect on the tangy flavor and pH level changes with smoked meat stabilizer and respond again though.