We know that in b1 universe, sburb was publicly released, so anybody could play and escape the reckoning, and we know that fedoraFreak did. But due to bec's stunt with the meteor, they didn't have long.
so first we need to know when john's copy arrived. He probably wasnt the first person to receive a copy, but no meteors were hitting before he got his copy, so most people probably got it at the same time. on john's computer, it says that it is 16:13, or 4:13 pm normal time. we can guess that when john's dad went to work, the copy was not there, and if we assume he left from 8 to 9, and he got home at about 3, (he was already baking when we strife), then the mail arrived sometime between 8:00 am and 3:00 pm. then we need to know when bec did the kill earth thing. at jade's island, it is still night in houston texas, where dave lives. first, i checked the weather data for guam in april 13 2009. the sun rose at 6:09 am and set at 6:33 pm, and we really cant see the sun, so it was probably astronomical twilight at least, which was 7:45 p.m. to 4:57 a.m. then, it was also night in texas, so i looked at more charts and it seems that 8 pm in the pacific and 4 am in houston seems reasonable. im not gonna try calculating how many people would get their game copy, and make it to the medium, but the timeframe was around 9 am pst to 2 am pst