I am first generation of TTT. I understand that nowadays there are many people joining TTT and the number of vouchers is limited. (Previously there were only a small number of participants so everyone received a voucher)
As a result, Many people have not received the voucher even though they have completed all the conditions. and there is a request from who not reciecved voucher on the webboard
Therefore, I think the conditions should be clearly specified as to the number of vouchers that can be distributed. and includes a ranking of people who will receive it.