(Untested idea) I'd suggest creating your own Root CA with an expire-date far in the future. Install it's public key as a trusted certificate and all derived certificates should not prompt any issues anymore
You can pay by Wire transfer, MasterCard, Visa, PayPal or even Bitcoin[1] so there is at least one anonymous payment option available 1: https://shop.threema.ch/terms
(Untested idea) I'd suggest creating your own Root CA with an expire-date far in the future. Install it's public key as a trusted certificate and all derived certificates should not prompt any issues anymore
You can pay by Wire transfer, MasterCard, Visa, PayPal or even Bitcoin[1] so there is at least one anonymous payment option available 1: https://shop.threema.ch/terms