Would you be able to expand on the statistics about reward distribution in nTopaz?

No. That's on web dev level or SQL query which I have no access to.

is there any patterns to nTopaz’ daily upvotes’ recipients?

It's found on the posting guidelines on the link at the bottom on the article. Whoever has the highest respect score gets to be in top 10.

How do nTopaz’s staff members (curators and coordinators) perform in terms of frequency of receiving rewards, when compared to a regular user?

There's token distribution monthly for their roles 3000 tokens but none of that happens if they are inactive. There's also upvotes for using the tag in their comments.