[hamed]

I would be at most interested in how exactly they use the upload speed. Could be easily abused if it is used in some botnet network, VPN network (i.e. like HOLA VPN) or other malicious ways.

Most likely no provide will tolerate this unless you have truely unlimited bandwith and dedicated port speed that you can always use.

Yes, by doing this, we give our IP Internet to thousands of other Internet users.
And that's a very dangerous thing, both for our personal system and the information in it and for ourselves.
Is not it?