I personally prefer to do it that way--you can create a more convincing review that's more likely to make sales. It's not always possible or practical, though; for example, would you break up with your significant other just to test a product for getting your ex back? ;-) In cases like that, or if the product is expensive, it's usually best just to use the vendor's affiliate resources instead.
Most marketers track and analyze a variety of metrics when it comes to their digital marketing efforts, especially for e-commerce. Some of the metrics are largely useless, others are very interrelated, and maybe only a few are the critical KPIs. Here, we’ll examine the most important metric of them all when assessing your e-commerce website. Specific to digital marketing and e-commerce, I’ll argue that the most important (and often most misunderstood) metric is Revenue Per Visitor, or RPV.
If you have a good idea for an app, and the skills to create it, then producing your own premium app can be profitable. However, with so many free apps available, it may be hard to convince people to pay. If you want to go down the premium app route, consider having a basic free version to encourage people to download the app in the first place. You can then provide the option of upgrading to a premium plan once users realize how useful the app is.