Are there discounts for disabled riders? This is for Uber and Lyft.

There are not. Uber has UberAssist, which will bring a driver who will meet you personally at your door and assist you to and into the car. Similarly they will assist you out of the car and to the destimation door.

No cheaper, but the driver is rewarded with 5% more of the fare.

So door to door instead of curb to curb.

As others have noted, the fare is already pretty much cut to the bone. Uber has yet to make a profit.

I am in Davidson county Tennessee and we have a ride share program UZURV360 which contracts with WeGo public transit its like Uber and Lyft for door to door pickup in a personal vehicle you can book up to a week.

https://m.nashvillemta.org/Nashville-MTA-Mobile-Options.asp

Uber doesn't. I even asked them.

These types of discounts are usually provided per the rules mandated by the lawmakers and apply to entities under regulations.  This is considered as a public service.  It's usually subsidized by others and not meant to make a profit.

Since Uber doesn't follow regulations at all, even if your city has such rules, I doubt they'd follow it.  LOL.

Seriously ? We are working for rates that is comparable to a taxi in a third world country. 

Nope.  Everyone pays the same rates.