A: No. Unlike some other affiliate networks, ClickBank is the retailer in the transaction and is responsible for tracking and paying commissions, so vendors cannot attempt to avoid paying commission on a sale. If a vendor requests a refund on a sale, they lose their portion of the sale as well, so there is no incentive for them to pretend that a sale has been refunded.
So ultimately making money online is about actually getting people to your website, however you have to do that! And it’s not like people who own gas stations or restaurants or grocery stores. Instead of 90 percent of people who “enter the building” of one of those brick and mortar businesses BUYING SOMETHING, with websites probably only about 90 percent (or less) of ONE PERCENT of the people who visit your website (from my experience) buy anything. You need 100 times the amount of people to get the same amount of sales but your expenses can be a lot lower than a brick and mortar business.
The products and services you will be promoting to your audience must be relevant and good quality. Make sure you believe in them and know everything about them, because this will be crucial to you delivering the sales pitch to your audience. You need to build trust with your audience so make sure the products and services you choose to promote are trustworthy enough.