I personally don't use that shit anymore due to the time it takes up.  I also haven't checked out a provider's twitter in about 5 months. Occasionally, I would read about a provider but I lose interest in seeing anyone's day to day life, selfies, shopping and shit. Like most mongers here, I like the action not reading about it.  
It helps me get an idea of where she's at or if she's still around though.  

And there are values for providers who are using it. I've invested in a social media startup in the past soley due to the traction it gets which tells me that people in general find it interesting and useful for them. We can not deny the fact that it establishes a connection between provider client, it is indeed a tool to facilitate and create their own brand. Celebrities, politicians, and many other businesses use it for a reason.  

It's really common among PS. Surprisingly though, as much as I'm paranoid about discretion and privacy, I haven't run into any security/discretion issues so far seeing well reviewed providers who also utilize twitter. Twitter has privacy settings and many do seem to utilize this and protect their tweets.  

As long as the provider isn't dumb or careless enough to list the hotel she's staying at or going to stay at, we're fine IMO. In terms of discretion, it's really no different from a provider who updates her website or posts on the board.

Imo it is about the same as updating her website or blog or calendar.  She can control location update.  

Some of the ladies I visited have their tweets set to private only.  
If she never met you you can't read her tweets.