Hi, are we allowed to give link to the photos we use from free sites like pixabay on description section and in the help file we upload?
Yes. It will be better if you post a links. I always post the links in the description
but are we allowed to post links to sites other than photodune?
In item descriptions yes
Yes sure. Why not?
Here are some popular sites I recomend:
www.pexels.com/