"If your product is more of a tech side and starts with less than $20-$30 then chances are less people are going to promote that." Why is that ? I didn't really get it.
5% of $20 is $1, meaning you won't be able to cover operation costs even if you sell 100 of it every month. If the product/course/service is $2997, and your commission is 5%, you are looking at $10k+ net profit every month if you sell 100 of that.
In addition, because the author/creator/founder of the $20 doesn't have a high profit margin to begin with, the commission rate will be very low compared to premium products/services. E.g., 5% for $20 product vs. 20-30% for $2997 product.