I'm not sure to understand why.
In my case, I think that if if it happens that I receive the email in my phone (that is, when I'm not in frond of my computer), I'll make it as 'read', and it will be forgotten in the middle of the not-so-important emails (that is, outside of the inbox, in Gmail).
I only read rss news on my computer, so it's far more likely that I'll read and enjoy it!
