Farming efficiency

a_i	workhours(a_i / 700)	s_i	s_i / i
700	1	1	1
1400	2	3	1.5
2800	4	7	2.3
4200	6	13	2.8
5600	8	21	4.2
7000	10	31	5.2

The current working time is about 240 seconds (the default setting). Say 5 minutes takes a round, with one hour it comes around 700. Call this 700 bp as one "workhour", and s_i is the hours to take to get the corresponding crates. The right most column is the average hour to get one crate at that stage. After the 4200 crate, it's hard to say the last two are worth waiting. A polarized example is that, if you use one account and get all six crates(you need 31 working hours), theoretically you may open 31 accounts, get every of their first crate only, the same time you would get 31 crates. That's 5 times productivity. Our suggestion is not to buy crates after the 4200 crate. Last but not least, the value you can get depends on the expectation of one single crate.