If you have to earn $50-$100 commission you have to sell product of cost $500-$1000 (If you’ll get 10% commission). If anyone who is reading have the potential to sell product of this much amount then why not he/she should start selling his/her own product. And money ultimately comes when a service or product is sold! So if you can write an Ebook then write another which you can sell for money!
Cafe Press: This website allows you to create digital designs that can then be sold on the platform. You'll earn a commission for everything that sells and you'll never have to deal with logistics like printing, warehousing and customer service. If you have some graphic design skills, then this is a great potential source for your web-based income.