i remember reading about this now that you sent me the link. thanks!
You don’t get insurance cards, because CrowdHealth is not insurance (it’s better IMO).
As far as coverage, check out this page on their website: https://www.joincrowdhealth.com/how-it-works-v2
TL;DR, you pay the first $500 for each health event. I believe a health event can range from a broken arm to brain cancer.
Discussion
I have preexisting conditions (which they don't cover for three first 2 years) and it's still working out to be cheaper. Probably wouldn't be the case if I had an employer + HSA, but even some employers rates are high these days.
It's about $300/month for 2 people + whatever health care you consume.