I didn't get it either. I just changed companies. Previous company I worked for may or may not have been a preferred UA partner and we didn't use Concur there, however the majority of my GS qual spend in 2019 was from biz trips with that company. New company uses Concur and is a UA partner, I linked Concur to my UA MP# last week, but no 400 PQP for me. However I do see the option to book business vs personal travel (Corporate Fares vs Break From Business) on the UA website now, which I didn't have earlier. Possibly I linked Concur to MP just a little too late and missed the cutoff for this 400 PQP offer. FWIW I am 12K PQP so far this year, and obviously GS renewed, but chasing PQP for PPs.
Anyone who didn't get it try calling/emailing GS/1K customer support?