Can I use the upload tool from fotolia when I was never registered there and have been only using Adobe Stock so far? Where can i find it? I get always redirected to Adobe Stock...
Yeah, I was assuming that Fotolia has/had some categories for these kind of images. When I look at similar images at Adobe Stock (see: https://stock.adobe.com/de/search?load_type=search&native_visual_search=&similar_content_id=&k=bokeh+background) they are assigned to categories I can't chose in the Adobe Stock contributor tool...
No, as far as I know you can't use the Fotolia supplier portal if you have registered as a supplier via Adobe Stock. Fotolia does not accept any new registrations as a supplier anymore, only via Adobe Stock. Only vendors who have registered with Fotolia before the acquisition of Fotolia by Adobe can use both portals.
I don't think the category is always so important for accepting the picture. It just has to fit the picture. As you can see in your linked search, there are also backgrounds in the category "Christmas" or "Road Traffic".
It is also important to mention this in the title of the picture and the key words.
If you can't find the other categories listed on Adobe Stock, there are no subcategories like Fotolia on the Adobe Stock site, so you can be sure that these providers have uploaded their pictures via Fotolia.
I think, you could save yourself a lot of headaches and work if you show some sample pictures here, because not always "non conform" means that there could not be other reasons like e. g. from a technical point of view.
Greets
v.poth