"does NOT constrain user's rate limit" should be "does NOT rate limit incoming requests" or similar.
"We will try out best" should be "our best".
"when our servers are under high traffic pressure" is at least grammatical, but it's awkward. Normally you'd say "when our servers are dealing with high load" or something similar.
"your requests may take some time to receive a response from the server" is again grammatical but also awkward. "Our response times may be slower" would be more natural.
The last sentence is also awkward but the whole thing would need to be restructured, which is too much for an HN comment.
Basically: everything about this screams English as a second language. Which does mean that it's unlikely to have been LLM generated, because from what I've seen DeepSeek itself does a pretty good job with English!