+1 and I also agree with Jicky's comments as well the people who need this the most are the one's least likely to pay attention to an open letter.For me it seems to be very straightforward:
the models are on MFC to make money, and if a models thinks engaging in chats and PMs helps , the model should do it .
If the model thinks it is not helping to make money she should focus on other things helping her more....
A lot of members try to get stuff for free, it is really up to the model to draw the line where she is comfortable..see no point in making big announcements...
I totally understand what Mojito what was saying, but I was bothered by it bit.
Because I think this scenario is fairly common.
A model that I've tipped has a bad day on cam, or troubles with her parents, landlord, sick grandmother, airline, telephone company and post something on twitter. Or sometimes it's a positive thing, made top 100, graduated from college.
I send DM or MFC mail (if it's a cam related issue) expressing sympathy or congratulations, in some cases maybe even a suggestion. Let's say it's an issue with an apartment, I'm a landlord, so I've actually read the laws for a few states, so I may send a detailed note. I'm fine if the model never gets back to me, most do and thank me for the note. In some cases, they'll start a conversation, which fairly often is a rant on the part of the model about the landlord or whatever. I generally enjoy a good rant so I'm more than happy to hear them.
I don't think this in the OPs intention, but if I read her open letter literally. I get don't send my sympathy or congratulation notes unless it's accompanied by a tip. That doesn't sit too well with me.