The value of the upvotes depend directly on the value of STEEM at the time of upvoting (actually it is the value of STEEM at the time of reward distribution which is 7 days after posting). This is why it is changing a little bit every day. But the amount of STEEM rewarded per upvote stays relatively the same as the value of upvotes is directly tied to the value of STEEM.
You have collected your daily Power Up! This post received an upvote worth of 0.97$.

Learn how to Power Up Smart here!
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
Submit
You promised $1.28 Upvotes but you are giving me $0.97.
Hmm
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
Submit
The value of the upvotes depend directly on the value of STEEM at the time of upvoting (actually it is the value of STEEM at the time of reward distribution which is 7 days after posting). This is why it is changing a little bit every day. But the amount of STEEM rewarded per upvote stays relatively the same as the value of upvotes is directly tied to the value of STEEM.
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
Submit
Rubbish... I just wasted my steem
Will I then get up to 20 Steem after 29 days with all these
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
Submit
You have collected your daily Power Up! This post received an upvote worth of 0.92$.

Learn how to Power Up Smart here!
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
Submit