Streamyx adsl is 4mbps download, 512 kbps upload

That is like max 512 Kb/s download speed, and 64 Kb/s upload speed

As you can see the download is more disproportionately larger than upload. So you will have a ton of streamyx user downloading, but hardly uploading.
The point of this DC++ hub is for Unifi fiber optic user that can download and upload fast. Especially upload part    5mbps, 10mbps, 20 mbps upload 
I think however that Penangfon/Metrofon users should be allowed to join. They have 2mbps download and upload, so that should be more acceptable speeds. Also they too are fiber optic broadband.
Time Fiber broadband is fine as well, but i doubt many have it 

Its just the nature how ADSL works. Most likely you are going to limit your upload and just leech. UniFi users would again wouldn't be facing this problem at all.

It activates your webcam and looks for a view out a window. Then compares it to Google Street View imagery to confirm that you are in an area covered by Unifi, such as Bangsar or Damansara.

Watch when you first start up the DC++ client - your webcam light will flash on for a split second. If you don't see it, you probably blinked. Get some eye drops and then try again.