era challenges

You’re wrong. I’ve got the bonus crate twice and have no battle pass. 

Not precisely true; if you got them to higher star levels, you could claim extra character feats. This can be done with crystals. Mine are only 4* and I got the token already and will hit end crate today. So someone only going as high as 5* (again, f2p friendly with enough crystals), I could see them having enough feats to have tapped final box a couple of times.