Looking for a very cheap host/server that allows for running proprietary windows program.exe (under $10 on monthly plan)
Background: Basically the exe just listens on a port Y [eg 2001] and process the custom information received into text and append that into a csv file. (The special information will be provided by a 3rd party connecting to port Y, and sending the updates every minute). When normal user http to the site, the host/server will render a plot from the content of that csv file and show it to them, that's all.
Though I'm not sure what you want exists, you'll probably get more responses on webhostingtalk. From your description of what it does, your .exe could almost certainly be rewritten in an interpreted language that runs anywhere.