Would these be considered "commercial use"?
From the Creative Commons website:
A commercial use is one primarily intended for commercial advantage or monetary compensation.
Would it be considered commercial use if an image was used in a blog post that provides valuable info to readers and isn't trying to sell something (e.g. a guide, how-to, etc.)? The blog would be part of a website that does offer services though, but there's nothing you can purchase on the website.
Commercial use means that the image is used directly in the marketing and promotion of a product that results in monetary gain. Otherwise, you are fine as long as you don't claim ownership of the image either explicitly or implied.