1 page = 1 credit. Your account counts credits; each generated page uses one.
Credits are held when a page starts and only charged when it succeeds. Failures, timeouts, and refusals give them back.
Downloading a finished result is free, as often as you like, as PNG, JPG, ZIP, or PDF.
Once a page is generated, its credit is settled. Typos, missing words, and dissatisfaction are not refunded. Another try is a new paid generation.
One-time purchase, no renewal. Credits currently do not expire.
You can choose the country or region. It starts from your network location. Until WeChat and Alipay open, every country including mainland China pays in US dollars by card. Tax may be added. After those channels open, mainland China switches to the fixed renminbi price, paid with WeChat or Alipay. Card numbers and payment passwords never reach this site.