How long does your offer stand, I will pay you today for 4BTC a year from now at $25.
if you pay me $25 today, i don't actually care, if you take those 4BTC today, or if you take them in a decade, or if your grandgrandchildren take them someday, it'll still be 4BTC.
thing is, you don't offer 2BTC/day, you offer 300Mhps/day,
in a year from now
(or in 1487blocks to be precise) you won't get 2BTC per day from those 300Mhashes anymore.
besides that, i made YOU another offer,
you said you only have 3 GPUs to spare,
so if you get more than 3 customers that want to take your service over a long term,
i'll happily jump in to help you.
you get $750/month/300Mhps from your customers,
i rent 1Ghps from vladimir for ~$500/month and send it to you for only $750/month,
you can then resell to 3 of your customers for 3*750= 2250.
vladimir will win, i will win, you will win and i guess your customers get the best deal of all.
what do you think, are we in business?