In order to maximize battery life and prevent user fatigue, we only alert the user to begin recording when they're approaching a task coordinate by referencing the cached coordinate with the current GPS coordinate which is readily available even in Airplane mode. The "workload" for test users so far averages about 5 alerts per flight or 5-10 minutes of "recording", typically shortly after takeoff and prior to landing. We're using Lobe to train an ML model with the image feeds, so we're working on implementing a Captcha-style post-flight survey where a few sample images taken in flight are presented to the user for first-pass labeling. If a user completes this survey, they're rewarded with additional airline miles as a thank you
There are plenty of other opportunities to gamify the recording process and we've been taking cues from apps like Waze and OpenStreetMaps to inform some of these potential reward features. Possibilities include revenue sharing, free flights after reaching milestones, travel gear, etc. I remember flying Spirit years ago and they always had a fun way to reward the unlucky souls in the middle seat by putting a sticker on one of the tray tables. The passenger sitting in the "lucky" middle seat got a free round-trip ticket which I've always thought was really cool, so perks like those are top of mind as well.
Tl;dr - we're intent on keeping the UX transparent, engaging, and unobtrusive for the recorder--point, shoot, disembark--while rewarding them in kind for their time and effort.