I specifically don't use smartphone boarding passes when travelling (on full service airlines, mostly LH group), just so they get the statistic of me using pape

I specifically don't use smartphone boarding passes when travelling (on full service airlines, mostly LH group), just so they get the statistic of me using paper. (The barcode has an 'issue type' field, it's a single character and generally the only difference between digital QR and paper PDF417 contents.) (I collect paper boarding passes and want them to stay ;)