I am new to the industry and have some questions...

UA has interline agreements with OAs that allow diffrent ID levels. So if say I purchase ID75 do I get a higher BP than someone who purchased ID90?

Also, a couple of airline agreements listed ID50, and it wasn't for company business travel. So I was wondering, has anyone ever seen where you can actually purchase positive space travel? So far the only one I've ever seen where I KNOW you get confirmed space is when British Airways offers the Speedbird fares (currently not available, I guess it's seasonal).

I think some airlines have confirmed tickets using ZED fares, but none that UA has ZED agreements with (currently we only have ZED with LH and AA).