I use mobimatter, keepgo and bitrefill. None of them do KYC, all can be bought anonymously with some cryptocurrency. mobimatter and keepgo are valid for a year without a top up, but you can top up with 3$ at least in keepgo to keep it alive for another year. 

I just buy 50GB of data and when it expires, I but a new esim.

Also, the price is around 1/3rd of silent link last time I checked. 

I am glad that all options (including silent link) exist. KYCed sims are just for normies.