Low traffic from google display campaign

Hi, i am running a CPA offer in google display network (on 3 different adwords accounts and with cloaker on). Now my issue is the low traffic and spending, my budget is set to $1500 per day in account 1, $2000 per day in account 2 and also same in acct 3. But adwords hardly spends like 600-700$ in account1 and even less in other 2 accounts.

My campaign settings is following:
1) Desktop only traffic in account1, account 2 is desktop+mobile/tablet (50% decrease in bidding)
2) CPC is set to .50$ and CTR is 0.84%
3) Google display network only
4) Geo is USA
5) Campaign strategies are manual click with enhanced cpc (maximize conversions) and maximize clicks but almost same spend with both strategies
6) Google pixel is set up so i can track the conversions

It's really weired that i can't even spend the $1k per day on google display. So can anyone give me a suggestion on how to increase the traffic for my display campaigns?

Slightly increase CPC to see what difference it makes.

I don’t use AdWords, but used to arbitrage a lot of popunder traffic. Anytime I bid with “popular rates” like $0.50 or $1.00 I always saw a noticeable difference by increasing even if it’s just by a single cent.

A lot of new business owners will be like “I’ll start off bidding $0.50 and see how it goes”. So you end up with a bunch of people with the same bid and same targeting. Whereas they rarely think “I’m gonna start off at $0.51 cents.”

Well, my initial bid was 0.35 then i raised up to .50 and that makes not much difference. But i am gonna raise up a bit more to see if it works.. may be .52.
Thanks for the suggestion tho