There are tweet ads, yes. They are usually marked as "promoted"
I found it useful to "report as spam" the account they were coming from so at least you only see them once...
I found the new layout to be headache inducing for my english-speaking, left-to right-reading brain so I switched to the Chrome plug-in Silverbird on TVGugs recommendation... and haven't seen the promoted tweets since. Maybe that's because I'm using lists more... but it solved a lot of problems for me.
If you are just trying to get the photos back, I've had good luck with the free version of Zero Assumption Recovery (z-a-recovery.com) when I've accidentally deleted photos from both a Sony memory stick and from my flash drive.