Cards returning prices.tcgplayer only, no eBay source, /listings empty

[CardChase151]

Using the API directly rather than the SDK, but this looks like the right place
to raise data coverage. Happy to move it if not.

Some cards return a TCGplayer source and no eBay source at all. On those,
GET /v1/cards/{id}/listings returns {"data":[],"pagination":{"count":0}} for
every country I try (us, eu, gb, and no country param).

The cards are actively traded, so this reads as an eBay match that was never
made rather than cards with no sales history.

Two cards from the same set, same release date (ME: Mega Evolution Promo,
2025-09-26):

GET /v1/cards/019c0010-df7e-75f8-9930-9bdd8c53e140      Riolu 010
  prices keys: ["ebay", "tcgplayer"]
  ebay saleCount 641, listings 20

GET /v1/cards/019d0df7-e5f2-74ca-91bc-77cce532d7b8      Charmander 038
  prices keys: ["tcgplayer"]
  tcgplayer saleCount 7501, listings 0

11 cards found so far, weighted toward promo sets: 6 in ME: Mega Evolution
Promo (037 to 042), 2 in ME05: Pitch Black, 1 in SM Promos, 2 in XY Promos.
Ids are in the list below.

019d0df7-e5f2-74ca-91bc-7183a242de5c Bulbasaur 037
019d0df7-e5f2-74ca-91bc-77cce532d7b8 Charmander 038
019d0df7-e5f2-74ca-91bc-7ad6fa9057ee Squirtle 039
019d0df7-e5f2-74ca-91bc-7cc3e6843600 Turtwig 040
019d0df7-e5f2-74ca-91bc-83c236971aa0 Chimchar 041
019d0df7-e5f2-74ca-91bc-870b721efeee Piplup 042
019f3f0e-6b89-719e-b157-86472c10e28a Primarina 088
019f4cf0-67f1-7136-9b3d-c462271ea81b Mega Darkrai ex 101
019bff8d-8220-71c8-938d-d2756cfc3126 Tsareena GX SM56
019bff8a-a5c0-76a9-86a2-9b52655a1991 Beheeyem BREAK XY135
019bff89-bc5e-71ed-9467-b04c814e80d7 M Blaziken EX XY86

Is there a supported way to report a card as missing its eBay source? Right now
a consumer cannot tell "no eBay source yet" apart from "no recent sales", and
those mean very different things to someone valuing a collection.