Our badge should increase your conversions. However, we always recommend testing.
It can be difficult to determine if something is helping conversions, unless you have accurate data on your past conversion rate. That is why we recommend collecting this data by using a click tracker or a conversion optimization software (such as VWO). Conversion rate is the amount of sales you achieve per visitor. For example, a 1% conversion rate is 1 sale out of 100 visitors.
The ideal situation would be to run a split test: one version of your site with our badge, and one without. You would run this for a period of time. If the conversion rate with the badge is higher (and it offsets our monthly subscription fee) then having the badge on your site is a complete no-brainer.