Logs your flightaware rank along with last check-in of your specified feeder. Nothing too fancy but can help visualize if your feeder is having issues checking in and watching your rank decline based on it
curl --silent -X POST "https://maker.ifttt.com/trigger/${ifttt_event}/with/key/${ifttt_key}" -d "value1=${rank}&value2=${lastCheckIn}"
Added as an issue to track the fix.
The main issue running this script directly from crontab was that it would sometimes contain script names or other text, which is why it is ran from proxy.sh as this solved the issue for some reason.
Though, the script should not send anything to IFTTT if it is not numerical as it messes with the collected spreadsheet.
The script only sometimes outputs a non-numerical output when ran directly through crontab, so preventing output when it is not numerical should be enough.