In order to combat spam map submissions we have imposed a limit of 5 free jobs per account per 24 hour period. If a 6th free job is submitted during this period the following message will be received:
"This user's free job quota has been reached for the day. Please purchase your aircraft from Drones Made Easy to raise the quota."
In cases where a user is running a lot of smaller jobs and doesn't mind paying because they just need to get the smaller jobs done, check the "Force Paid Points" checkbox in Step 2 of the upload workflow. This is the workaround for being able to submit large numbers of small jobs in a short period of time.