Difficulty is the "tool" of the network to adjust the speed of block generation. This upward hashrate trend forces difficulty to rise in order to slow down block generation from 7min/block to 10min/block. This rougly means that whatever may come, block generation won't be slower than 10 min/block (@ this current upward total hashrate trend). Therefore we can calculate the lowest div/share of LC if we know: the hashrate of LC, and the total hashrate.
The simplified, diff-excluded formula is this:
Total LC mining profit = LC hashrate/Total Hashrate * 144 (a day is 1440 min long, so 144 blocks a day) * 30 (number of days of the month) * 25 (block reward excluding transaction fees)
And dividing this by 10million comes the div/share/month.
This formula does not care about the fact, that the LC hashrate/total hashrate ratio does not necessarily equal with the LC mined blocks/ total mined blocks ratio, but as far as I know it is pessimistic enough to let us exclude that fact too.
So the concept is: Block generation is fixed 10 mins (which is the longest possible generation time in an upward hashrate trend), and the LC mined blocks/ total mined blocks ratio equals with the LC hashrate / total hashrate ratio.
What do you think? Is this formula a valid way to calculate the worst div possible @ a given LC and total hashrate?
Expenses are not included and are non-trivial.
Well, f*ck...I forgot that part. Do I need to multiply the whole div/share part with 0.8?
EDIT: According to the stockholder agreement, 70-80% of the above-calculated total profit will be paid out in divs monthly, so a multiplication with 0.7 is good for calculating worst divs.