nearly empty results data with Etext type in recent acquisitions query

[berger-n]

(continued from buda-base/public-digital-library#979)

not sure what to think about these results with so-called Etext type? they seem to appear in this query only
(and the corresponding data is quite empty)
https://library-dev.bdrc.io/?sortBy=firstScanSyncDate_desc&type%5B0%5D=Etext