Talking about EVGA? read this
https://www.evga.com/support/stepup/
Products known to have a limited availability will not be made available to the Step-Up program. (Limited availability determined by EVGA.)
Customers who received their EVGA graphics card as part of a complete computer system are not eligible - except for those listed on our approved system vendor list.
Graphics Cards Examples:
GTX 980 Ti → GTX 1080: YES (Upgraded GPU)
GTX 1060 3GB → GTX 1060 6GB SSC Gaming: YES (Upgraded Memory)
GTX 1080 FTW → GTX 1080 Ti: YES (Upgraded Model)
GTX 1070 Ti → GTX 1070: NO (Downgraded Performance)
I expect the 2080 is have extremely limited availability.
And its 90 days after you got your GPU only if you...