I really struggle with the math being incorrect, and another thing to note is some people use the abbreviation "m" for thousand and some for million (those who use it for thousand use "mm" for million).
The math 600million to 1billion, is not nearly doubling the investment. 400million increase on a 600million investment is 66.67% increase which is far from double as double would be 100% increase.
Will the promos be available to buy with credits? Will that be converted to DEC and sent to DAO?