The percent of jumpers that show in FEI is very small.
The number of H/J shows that offer FEI GP's in very small.
As a result the FEI chip requirement is not relevant to a H/J show.
I'm sure you are aware that the tiny number of shows that do have FEI level classes for jumpers would have usually no more than 100 horses to be scanned.
Shows like WEF have thousands of horses entered. Sorry, but scanning them will certainly delay check in.
And please do some research yourself into the various types of H/J shows that USEF sanctions, not just the WEF type shows.
Again, if USEF wants to buy scanners and check all horses that are drug checked that would be great because it shifts the responsibility for scanning off the show management and onto USEF.
And of course, cheers to you.