The ad system doesn't publish a readable sellers.json, so nobody can verify these lines. That's the ad system's gap, not the app's, so no points are deducted.
Evidence (9)
line 1 facebook.com, 4224956911075308, DIRECT, c3e20eee3f780d68
→ sellers_json: returns a web page, not a sellers.json file
line 3 facebook.com, 1587124753041886, DIRECT, c3e20eee3f780d68
→ sellers_json: returns a web page, not a sellers.json file
line 13 gamaigroup.com, 423056, RESELLER
→ sellers_json: file is not valid JSON
line 16 loopme.com, 11303, RESELLER, 6c8d5f95897a5a3b
→ sellers_json: HTTP 403 to automated requests
line 17 loopme.com, 11424, RESELLER, 6c8d5f95897a5a3b
→ sellers_json: HTTP 403 to automated requests
line 20 openx.com, 540785403, RESELLER, 6a698e2ec38604c6
→ sellers_json: HTTP 403 to automated requests
line 21 openx.com, 559798512, RESELLER, 6a698e2ec38604c6
→ sellers_json: HTTP 403 to automated requests
line 28 pubnative.net, 1007501, RESELLER, d641df8625486a7b
→ sellers_json: HTTP 403 to automated requests
line 37 smartadserver.com, 3817, RESELLER
→ sellers_json: HTTP 404