I mostly disagree with you. I am one of the people that won the amazon $100 gift card for the 2019 beta program and unlike what you may assume I don't have a background close to what you may think they wanted.
I am a student whose experience in the industry and IT is nothing compared to those mentioned.
All experience I have is a bit of programming and helping others on forums with system performance and crashes which I haven't been doing for long.
Once I got in the program most of what I did was report issues with the VPN the first couple of days. Those were pretty much all issues I could find the entire time though. Others were some compliments, because I like the UI, and some UI improvements. The rest of the time I filled by learning all the options the software has, and talk with others. All that did not require me to be active each single day, there were actually days where I didn't report anything.
In the end there may have been some bugs, but I wasn't even able to replicate any bugs others reported during the program.
You should not see it as a job, rather as something you want to do so others gain from it. If you see it as a job you may as well not participate, even if you're in for the prices. It won't gain you as much as those who do it for fun.