It stands to reason that if you buy in bulk it shpuld be a little cheaper yes? Well... If you buy a 1000 booster for a month, that is $100. And with a 1000 booster you gain 20 times the amount of a 50 booster, right? So that means that 50 booster for 20months = 1000 booster for 1month. So why is it that a 50 booster for 20 months costs (if buying in leaps of 3 months) only $87, while a 1000 booster for 1month is $100? Surely a 1000 booster should cost at most $87? Not that im complaining, or that anyone really cares, but it makes sense.

The 1000 booster would take less time so costs more

No your all wrong... You should atuomaticlly get a 1000 booster! XD no seriously it costs more probably cus they didnt care to be exact and rounded it up some.

Well think, wanna take 20 months to get for example 150k, just with that 50 booster? When you could us the 1000 booster and get it tons quicker.. so compare that...50 booster takes forever
1000 booster so very fast
And for just a 13 dollar difference! :P