I’m sure that there are few here who are not aware of recent changes to Bing’s offering.
A combination of this and people having asked us in the past to drop them has meant that now we have done so.
Instead you have Search-Choice-like buttons which allow you to repeat the image search elsewhere, with Pixabay being now the only provider on Mojeek’s Image Search.
We are looking at this area currently with a view to putting something different in its place, no timescales currently in mind, but watch this space.