You are actively receiving votes, though. The value accumulates until you have enough to receive an 0.021 upvote. The more units you have, the faster the value will accumulate, and the more frequently that you would receive upvotes.
Witness the 0.024 upvote from @sbi4 here: https://peakd.com/hive-192162/@osomar357/big-dog-bone-sorteo-giveaway-8e960afeb5e8f
You cannot really expect to receive an upvote on every post when you are posting 7 times per day and only have 25 units?