It was a bit of a surprise, Acro,
Of the top five new .com registrations hosters in September, four out of the five were Chinese with only Godaddy (domaincontrol.com) being the top. Chinese growth in COM/NET in the last few years has been outpacing Germany and the UK. That's a similar pattern to the .CN Olympics promotion that saw .CN overtake .DE with subsidised/low cost registrations that promptly disappeared at renewal when the fees went back to normal levels.
The renewal rates vary on hosters with some of the small hosters (webdevelopers etc) having renewal rates around 70 to 80%. Normally when a hoster or registrar or registry runs a promotion, there is a spike and then a slump because those domains don't renew at the normal rates. However some hosters use discounting as a business tool and have a low renewal rate (20% to 30%). Large retail hosters can have renewal rates upwards of 65%. The .COM is pitched as a global TLD but it is composed of many smaller country level markets. These blood trail renewal patterns are bad news in any TLD.
Regards...jmcc