StackPath – CDN with 31 additional data centers (Cloudflare has 150+ data centers, but more data centers = faster content delivery). I get around $1,000/month by referring people to StackPath in my cache plugin tutorials. StackPath recently bought MaxCDN and their affiliate acceptance rate is much lower (depends on your potential volume) but most cache plugins converted to StackPath as their recommended CDN
Anyone can become an affiliate marketer. It requires little or no start-up costs as you won’t be involved in the creation of the product. You will have nothing to do with the shipping or the customer service, don’t need to buy any inventory, and can instead focus on what you do best – selling the product or service. You may have to spend a little on the web hosting and domain name, but that’s not really much.