Can the approved line budget run out before the end date that the advertiser set?
Distribution is enabled for these strategies. It is based on the planned budget value. If the approved budget is less than the planned one, then ads will stop being placed after the approved budget runs out (which may happen before the impression end date).
Distribution is enabled for these strategies. It is based on the planned impression value. If the approved number of impressions is less than the planned one, then the line will stop after the approved impressions have been served (which may be before the end date).