If instant gratification is your thing, affiliate marketing will make you want to run into a wall. Even after you surpass the threshold needed to “cash out”, there’s usually a waiting period before your commission is confirmed/approved, simply because they allow time for people to return goods if needed. So yes, affiliate marketing is by no means a fast track to cash.
Affiliate marketing is a very large industry and has become a key source of online income for many thousands of professional bloggers. With more and more online businesses becoming involved in affiliate marketing, more opportunities have arisen for bloggers, like you and I, to make money with their blog. and to ultimately create passive income streams.
Always disclose your affiliate relationship. Most visitors will probably understand that graphic ad will lead to your getting paid, but if you write a review or use an in-text link as a recommendation, you want your readers to know that may lead to compensation as well. This ensures you retain transparency and trust with your readers, but also, it's required by the FTC's endorsement rules.