Okay dev, so you are probably well aware of these things, but I'll emphasize this anyway.
First, it seems that using google search to create thumbnails is not working. Maybe I don't understand what is happening, but there are cement trucks for bitcoin ads, and a picture of a fat twelve-year-old girl singing for a few services. What you should probably do is remove the automated thumbnail picture, only include a thumbnail if the user ads it (maybe even make it 4 coins for a no-pic ad and 5 with a picture). I mean, the randomness of it is quite comical, and the only ad right now in the women seeking women category is quite
The true strength of this coin is the websites downfall right now. The inability for censorship. You just see obnoxious clutter, but you can't moderate it. So there needs to be very strong sorting features. I think that you mentioned the ability to filter out certain words, but perhaps you need to think more creatively than that, it will be important if there are ever thousands of ads.