Quote from: Minor on November 08, 2013, 08:58:49 AM

So if you achieve 33% or less, it would have taken an extra 2x the hashing power to break even, so they double that and send you an extra 4x.
I'm surprised D&T didn't catch that, he/she/it is usually good with numbers and details.

Noted and fixed the post. Not sure how I missed the "double", this actually makes the MPP a better deal than I originally thought. As it stands now (delay and difficulty explosion) I think most users would get 4x even under my incorrect schedule. With only needing <33% by Jan 28 to get 4 boards I can't see a scenario where someone in Batch 1 wouldn't get 4 boards. Quoted the corrected version so hopefully anyone who saw the incorrect one sees the updated numbers.

Quote from: DeathAndTaxes on November 07, 2013, 11:37:05 PM

Quote from: MrTeal on November 07, 2013, 11:07:44 PM

Ignoring the Oct 25th to Oct 31st difference, if that scenario played out and at the end of January HF sends out one extra module because hey, a BabyJet would have earned 25BTC between Oct 31st and Jan 29th they will have a lot of pissed off customers.

The calculation for how much you have earned is based on the shipping date. By the letter of the program it is the first 90 days after shipping, that would mean if it ships 30 days late your MPP window is also extended 30 days which obviously makes the program a worse deal. Essentially customers are hurt by late shipping and then their compensation is also reduced. Many people complained it would be fairer if the MPP began when the units should have shipped so customers are not double penalized for late delivery. Thankfully HashFast seems to have agreed with that logic so the 90 day window starts on 31 OCT. Obviously for the days from 31 OCT to shipping date the computed revenue would be 0. You have 0 GH/s and 0 GH/s at any difficulty = 0 BTC produced.

So the MPP "payout" is based on the total of what a theoretical unit would earn each day between shipping and 28 JAN (90 days after 31 OCT).

They way I read it (and I ~~may~~ be wrong) if you units ships on say 15 DEC and between 15 DEC and 28 JAN you earn*:
>= 100% of purchase price = no additional boards (achieved break even in 90 day window)
>= 66% & <100% of purchase price = 1 additional board (200 additional GH/s needed for break even x2 = 400 GH/s)
>= 50% & <66% of purchase price = 2 additional boards (400 additional GH/s needed for break even x2 = 800 GH/s)
>= 33% & <50% of purchase price = 3 additional boards (600 additional GH/s needed for break even x2 = 1,200 GH/s)
< 33% of purchase price = 4 additional boards (600 additional GH/s needed for break even x2 = 1,200 GH/s)

On edit: My original numbers were incorrect. Thanks for the correction minor. The MPP "pays out" DOUBLE the hashrate that would have been required to break even in 90 day window. I updated numbers above.

I assumed that Hashfast will only pay out in "full board increments" and will round in the customer's favor as less boards won't fulfill the terms of MPP (i.e. if 127 more GH/s would have achieved break even, doubled is 254 GH/s. Since HF only produces 400 GH/s boards the only options are ship nothing or ship one board). The cutoffs above assume the number of boards will be rounded up in the customers favor. Also remember HashFast isn't going to monitor you individual rig. It is simply a calculated earning. For a given hashrate & difficulty a miner will earn x BTC per day. The sum of those earnings over the 90 day window determines the computed earnings and thus the amount of MPP payout.

Maybe Hashfast can confirm or correct me on this.