Whaleshares requires you to purchase and spend something, doesn't it? 1UP is not like that at all and always free.

A post that receives the most upvotes within a 2.4 hour timeframe is winning the blockchain upvotes from 1UP, when the entire community trail is being released on that post. Each post will have 24 hours to get enough 1UPs to win a round.

People cannot vote for the same person twice on the same day. But over time, I am sure that some people will stick out. It will be up to us to deal with that situation and improve the platform over time to our satisfaction. On the other hand I don't see a problem with that.

For example: The #indymedia tag will upvote 10 posts every day. Show me ten quality posts from that group on Steem right now. We will see the usual suspects there every day and it will be good for them and good for us. We incentivize people to hunt for undiscovered posts and 1UP them, so if new people will enter the field with good content they will be the first to get 1UPs from quality hunters.