Yes, we can self-nom 2 per month, which I used to complain about but now realise is fair enough, since we naturally want to publish on our own pubs - because they are in our specialist field, and to build their traffic - and as nommers are told not to pick from other nomming pubs, they would otherwise become effectively ineligible.
As it is, if we publish a third eligible piece on our own pub (rather than meta/housekeeping stuff), because that's the right place for it, effectively we debar it from nomming.
I do think it is wrong that we get the flat fee for approvals and the increased earnings rate for those pieces. I think it should be one or the other.
But to answer your question, last month 2 of those 10 were self-nommed, and I have had 5 self-noms approved in total, I think.
If those pieces hadn't been self-nommed on my own pub, I would have placed them elsewhere, and expect they would have been nominated and approved, though there is no guarantee.
The approval itself brings in a random factor, depending on whose desk the nomination lands, their character, mood, experience, skill, etc.
I still feel that consistency and standardisation require further work, as I have stated to Medium management.