I agree with
@namemarket that if the renewal was something less then those names in domainer hands would be retained to a much higher degree.
as all those are reversed-order, broader new gTLD extensions, and they usually works for majority of english keywords and also present good alternatives to each other
I agree with the last part, about they can present alternatives as they have somewhat similar meaning. However, the reversed-order has been over-stressed in my opinion. Yes, they can be reversed, but both top and best can be a noun, verb, adverb or adjective. If we view them as an adjective and precede with a noun, the order is reversed. If we use them as a noun or verb, the order is, in most cases, the correct one.
I suspect that both .best and .top registries would complain that they are not comparable. Top is much more highly registered, but the vast majority of those registrations are in a single country. While there are now 18 NameBio listed .best sales (17 from most recent 12 months - although many were simply expired auction sales to domainers, maybe almost all) they are at modest amounts whereas top has sold over a much longer period but has some very high (although mainly registry) sales in NameBio.
There is also the BEST social network. Until it is truly active, it is hard to see if that will make the domain names significantly worthwhile.
No doubt that .top is much cheaper to hold even if you stick with a major western registrar. However, if one viewed say a 3 year holding period and had taken advantage of the renewal promotions over Cyber Monday and in December then .best is not that out of line - say $2.50 year one plus 2 more years for $18.50 combined (approximate numbers) is a per year rate of $7.00 per year. If you add a fourth year at $18.50, then per year becomes just under $10 for each of the four years, about what I would pay for the better rates for .org per year. I really hope BEST will do another renewal promotion at some time.
The other thing to keep in mind is that BEST left many great words that would be premium in virtually every other new extension as standard. Even 3L were available as standard, all sorts of high value dictionary words, nice phrases. So the registry may view it that they need to make up for that through higher renewal rates.
I am personally keen on domain name phrases, and best works well for that. In that sense I view it as more similar to words like .life that works well in phrases. If you stick with western registrars to my knowledge you can't get a renewal on .life cheaper than .best. Of course .life has a record with some really high value resales going for it, so in that sense they are not similar at all.
I have renewed some of my .best. If I had more spare cash, or if rates were lower, I would renew more. I view the extension as somewhat high risk, as no record of $300+ publicly verified sales yet to my knowledge. But the inherent quality of some of the available phrases is good, and I prefer that .best is much more geographically spread than the other TLDs mentioned in this thread.
I agree, though, that the market so far does not justify $18 renewals. The TLD needs some time for the use of the extension to be enhanced and proven. I think TLDs like ICU did the right thing with good renewal rates (less than the legacy extensions) and every single domain name in the extension, even if first year was premium, is a standard renewal, so the system is clear. Certainly this new and old rates has made the .best situation unclear even to many domainers, and that is not a good thing.
Bob