What should I do?

Hey everyone. I found a product to promote, it's in dating/relationship niche and I would like to sell it using paid traffic.

For every sale I get 50$. The product is good and already sold more than 3000 copies (it's an e-book). The problem is the traffic source.

I have never ran paid ads and Facebook would ban me for promoting it. What other platform do you recommend? My budget is around 300-400$.

I believe that a budget of $300 to $400 is quite low for a product that offers a $50 commission. That ebook might be priced somewhere between $80 to $100 perhaps. If that's the case, you will need a higher budget. My recommendation is to look for a more affordable product or secure a higher budget.

There still chance you can use paid ads (fb, google) for that product, play with the wordings, don't make it too obvious