yeah ... looks alike bro... lots of people ain´t upvoting not at all anymore - which is kinda counter productive as they expect upvotes of their content but aint giving back any in return nomore... they should not be wondering too much if people are not paying no attention to them.
On the other side I do see quite a few more related issues... some couldn´t even upvote anymore due to bandwith issues - however this only be the case for minnow minnows - that doesn´t explain voting behavior of fish, dolphins or whales...
what really isn´t getting to my mind is what people stop from commenting even if they do not want to upvote? you know what I mean... if you have a point and may be disagree with once content you should still be telling them... this in return maybe helping that person improving their posts/ content and make them earn better rewards in the future...