There are various kind of old crypto projects that has no team but still they are among the best projects today, I believe this happened because many old projects followed the footstep of Bitcoin, bitcoin would have been in tougher situations if the team or ceo is public I believe but today it's a complete different story or should I say experience? Since the birth of ICO we've seen tons of scam projects that aren't scared of revealing their faces even when they knew they are going to exit scam on investors fund, so for me hidden team members or not still doesn't make a difference..
a few years ago, old coins need to mine to get it. we don't really concern about the team member. so yes, they follow the bitcoin footstep. you just simply invest your money on mining hardware, then you can mine various coins with that to get ROI and profits. but these days there are so many ICO, you risk all of your money on that. so you need to know that the team is not fake and the companies location is real.