(Sorry for my English, I'm French)
I would like to know, if we could insert the images inside the words. For example if I write the word : FRANCE, could i illustrate the word with the image.
Simple answer. Yes! But images have to be your own if you intend to sell them for stock.
Just create a mask in the shape of those letters and insert image. There are many way to do this so you will have to look it up. Or someone will tell your how. 🙂
As a customer of stock images: yes, no problem.
As a contributor: They need to be your images and I don't see the added value, but if they get accepted by the moderators...