Sort:  

everyone know that we got a good APR% from most of bots in couple weeks ago, up to 25% + but APR % now is at around 16%. The upvote rate has been dropping lower and lower, can be sometime 16% and sometime 22% now.

2 days ago @tipU had a good day ;) And in fact it was 22% if you measure the profit generated between 00:00 and 00:00

Let's try this:

  1. Random user pays 1 SBD for vote.
  2. User A receives his daily payout - for him, during this day, 1 SBD profit was generated.
  3. 5 minutes later another random user pays 50 SBD for upvote.
  4. User B receives his daily payout - for him, during this day, 51 SBD profit was generated.

Even though user B received his payout only five minutes after user A, his profit and APR was far better than user A - for this day.

Which APR for this day is right?

Of course user A will receive the profit from 50 SBD vote in the next payout - next day.

As for the other bots - for the love of God, just click it ;) https://www.steemprofit.info/

That means some day will eat part profit of the previous or the next day, but the overall 3 days profit is remaining the same in average. Are you giving the flat rate 10% to the bidders and there is no overbid with @TipU right?

Well, if the situation with user A and B happens on the 3rd day, the 3-day average will still be slightly different and it will need another day to balance itself out. As for the second question, you probably noticed the answer in second comment :)

I think that I have no more question about the service! Thanks again!

Glad I could help :) Have a nice day!