Strong dislike. I'm already paying $2.75 per ride - how much are the ads subsidizing my ride by? I couldn't find anything on it with a cursory search but my guess is not much - far less than the psychological cost of getting toothbrushes, mattresses, food delivery services, and who knows what other ads shoved into my face any direction I look. I think the worst ones are the TV show/movie ones lining the subway walkways where I feel like I'm walking through some sort of physical channel directory.

I do think the space should be reserved and used for advertising city services such as 311 information, elderly housing services, housing rights etc. It's a great way of educating the city residents about benefits and rights they might not otherwise be aware of.