Their policies are strict. Be sure to read through Amazon’s affiliate program policies very carefully. Any violation of their policies is grounds for account suspension--something which could be devastating if you build an entire website or store around affiliate links. Amazon has also been known to suspend accounts without any prior notice, so tread carefully.
The average commission rate is $58 per the Shopify website. Shopify’s commissions are paid according to different metrics. For instance, if a referral signs up for the Shopify Plus enterprise plan (the highest tier), the payout is a flat $2,000. Referrals who sign up for the standard plan earn a $598 commission. The payout for a Basic account is $58. Commissions are calculated as follows: you will earn two times the monthly rate but only two months after the user has been a paying customer.
Hey. Yes you can use just one website to promote multiple affiliate programs, but I’d say that your website should focus on just one niche. So you mention, SellHealth, that would lead me to believe your site is about health and fitness. I would then advise you to stick to that niche rather than promoting unrelated products like dog leashes and fashion accessories.