I don't consider it to be spam, but I don't believe it will get many rewards as there are whales that only vote for one user post per day.
A tip that I find interesting is to post one a day, and leave the other one ready for those days when you are not very creative to write. So you can bring different content every day and get noticed.
Whales aim for a lot of constancy and quality.
But if you can create more than one quality post per day, go ahead, I'm sure that even if you post two on the same day, if they were good posts, both will be well rewarded.
I get this now...