Questions about propellerads cpa goal

[Hao]

Recently, I used propellerads cpa goal to create several push camps, all of which were soi sweep offers, PL geo, cpa set 70% payout, but almost every camp was out of traffic a few hours after the campaign started, even without any restrictions on the target.propellerads support also only asks me to bid more, has anyone encountered this problem? I want to know how I should