Promos are like this are to be expected. The ones who even have wagered a lot coming to $20k or even more, there can be someone higher than that and the system will choose that one and as a consolation that $5 might give you some ease. But yeah, it's not worth it.
That's why with most of these promos, it's hardly to win there and your expectations from reality there is going to be far and that's why you shouldn't expect a lot from them.
What are they going to do with all the millions of emails + phone numbers they received from people?!
Just in affiliation they can turn that into millions as well... there were no privacy terms when the users emailed their data, right?
It's on them now what they should do with that but mostly, they will just keep it and might do some promotions again in the future sending notifications to all of it.