99.99% of people who join the site aren't going to turn $3 into 10k and obviously most people don't win a few hundred a week. Most people lose, like most forms of gambling.
GPPs definitely have better long-term EV but also far more variance than "cash games" like h2h and 50/50s.
It's tough to say how much overlay there will be week 1. Usually the sites like to take chances week 1 to see what demand is going to be. DraftKings is far more aggressive at this than FanDuel, so they will likely have some decent overlay.
Congrats on being alive and avoiding the ER. Pretty amazing feat.
Time will tell how effective that advertising campaign will be, but damn it's gotta be annoying for a lot of people to see that over and over and over.
My fantasy is Draft Kings and Fan Duel going 100 miles toward each other on the highway with Flo standing in the middle and upon impact the whole thing exploding in a fiery crash.