all centralized companies that do restrict access to their systems for all sorts of reasons (often not shared with the person being blocked)

all are "pull" methods where your account can be charged in an unauthorized manner

bitcoin, prepaid cards (such as paysafecard), cash and bank transfers are "push" methods giving the owner more control and cheaper fees for that manner

Not sure how practical paypal would be if you only want to spend a few cents (or more interestingly fractions of a cent!)