As of now one can still book free PCR with check2fly for future dates. One of the bloggers wrote that whoever has future bookings will receive a cancellation notice and instructions of how to rebook with the fee
So far the 'best' option I found in the merkaz, for those who don't want to go to BGI's check2fly, is Ichilov with the Lufthansa promo for 140nis and 24h turnaround.
AFAIK one just needs to show a miles and more membership but I'll report back