If they are declined due to being the wrong cigar or other irregularity, you will get a message. There is a limit to 5 images for a single cigar, so if there are 4 images already up, one will get deleted to make room for a new one (so that there is always space for a new submission). If your new submission is of lower quality than the 4 already up, or if you had one of the 4 that gets deleted, there will be no message (however, it will allow you to submit a new image).
Photos can take up to 5 days to get approved. I am the only approver. I try to get them vetted within a day of submission, however life, the number of photos in queue and number of database submissions can affect the speed at which I get these taken care of. Database submissions have priority, and they do take longer to approve. Also, the submissions to both the cigar database and photos come to me in alphabetical order, so I do not know which submissions are newer, and this can lead to newer submissions being addressed before older ones.
To give an example of the current database load, there are 13 cigars needing approval in the database and 11 photos needing approval. I will try and get as many taken care of today as I can.
Also, if a photo submission is for a cigar where there is currently limited information in the database, I will usually launch an investigation to fill out the proper info for that line, which can take time.