spend more so earn more
I could not able to agree with you that spending more will make you able to earn more. The spending area should have been reasonable. If you buy a service with higher rate then that wouldn't help you to promote your business. Also, if you do not select age, location, hobby etc while selection advertisement then you will not get the right audience as a result you will loss you money which will not help you to make money.
Spend more for advertisement to earn more? It sounds good but in the reality it does not work like that imho. However I believe any project has their own advertising budget and they should not spend more than the budget but they should spend their budget as always. For example a big brand like CocaCola, who do not aware about this brand? It is very popular brand but their advertisements can be found almost in all parts of this world but I'm sure they do not spend more than their budget.