pdb1:
What part of "they don't count toward average " don't they understand ? I guess they didn't understand that 500 ranked rounds with an average of 58.9 must be played.
For once, "Bo3 don't count" is written in the FAQs, "Changing Tiers". Bo5 are added to this, silently. Both still may be played as ranked for the chance to play them in tournaments.
Alas, that average threshold is new to me, probably unfounded a typo. To my best knowledge, the correct number is 60.000.
Edited.