The .TOP is effectively a Chinese gTLD with a much smaller market outside of China. The statistics, including the geography of .TOP (and all the gTLDs) and the numbers of .TOP websites by country are in the Domnomics book (available on Amazon).
I ran a quick check on the .TOP of December 2018 domain names still active in December 2019. The results are not exactly worrying but they show that the pricing of .TOP domain names has had an impact on renewals. It is one of the largest of the new gTLDs.
gTLD - December 2018 - Retained - Deleted - Retained% - Deleted%
TOP 3,514,579 - 615,317 - 2,899,262 - 17.5076 - 82.4924
XYZ 2,035,492 - 683,612 - 1,351,880 - 33.5846 - 66.4154
CLUB 1,140,507 - 367,484 - 773,023 - 32.2211 - 67.7789
This is a simple comparison of December 2018 domain names and those still live in December 2019. This is different from the renewal cycle as that can be as long as 45 days before a domain name can be either renewed or deleted. Those are the numbers and percentages for the main top new gTLDs. The problem is that the deletion rate for .TOP is higher than the others. This may be due to to the dynamics of the Chinese market. The other top new gTLDs have a more diverse geography and are less affected by the volatility of one country's market. Unless .TOP manages to get on to non-Chinese registrars, it is going to be remain a Chinese market gTLD.
Regards...jmcc