as a general curiosity, I have 1k PP and would consider selling some.
does it matter who they come from in terms of standing on a waitlist?
@Dan
There are different buckets available to 1k and GS
1k has the PZ bucket and the GS have PN bucket so inventory is much better for GS upgrade.
If PZ is available it does not matter but many flights will only have PN so Ik cant upgrade