$1,143 spent and 11 ad creatives. Here, $500 went to one post, $200 to some, and around $20–50 to others. Why? Because the 11 creatives didn't all bring the same result.
Test and analyze each one
First, you must test the ads and analyze the results of each. Find out how sales are going through each creative, and whichever performs best — direct the budget there.
That's exactly why one creative got $500 and another $20: money is distributed by result, not by the logic of "split it evenly."
Most important — find your funnel
The most important thing is that you test and find the best sales funnel for yourself. Once you find the funnel, you'll get results no matter how much you invest.
In other words, before increasing the ad budget, first find the funnel that works. Otherwise a lot of money just loses faster.