Not all myTakes are promoted. Infact, only a small percentage of all myTakes are being promoted. You can check all myTakes, including unpromoted ones, under "All myTakes" page which you can access from the top myTakes menu. Congrats on your promoted ones :)
A large number get promoted, yes, not all though. Editors get all their myTakes promoted instantly, even the ones they wrote before becoming an editor. They're fairly lenient on what they promote which I think is a shame and devalues the site and hides myTakes which are actually worth a read.