I think my answers to your questions are mostly 'yes'. But each member of the community may not agree entirely.
Short new reports are fine, but may come across greedy if there are multiple each day and the only person rewarding them is the author.
I am not too keen on short comments being upvoted by the author - new arrivals seeing this may be put off.
These are early days and so I guess we just have to take things as they come and make decisions individually and together. The links I shared today have been greeted with downvotes, I see your name on the list of people disagreeing with those rewards also.
Cheers!