In Chinese culture everything begin with 0
Of course, 0 is not better than 2 3 6 8 or 9
But is far better than 4, 5 or 7
If you check Name Bio you will see there is many 6N sales with 0 on beginning, in middle or at the end. And this sales are early sales
7 is not bad at all.. in fact 7 together with 8 is very desirable, hence so many 7 & 8 combinations regged by Chineses for long times already.. arise + wealth.. something like "arising with new wealth" / "wealth is coming to you" according to some of my longtime chinese friends
even 7 alone is still not bad really if you focus on the origins of 7 in Chinese culture.. just the later incidents like the July 7th incident etc. did put a damper on the number for a while, but all in all 7 is considered by far the luckiest number globally, over several cultures, countries, religions.
Example sale from Namejet just lately (far higher than most other 6N numbers handled there in same month because Chineses battled over it): 877787.com 2,507 USD 2015-09-27 NameJet