1. LeagueCheats as a whole since about 2007, undetected in CSGO for 2 years now.
2. Internal.
3. Silent load isn't an option right now, but Jimster may be able to accommodate if you ask him nicely.
4. Possible if you just use the pixel ESP with the right colours as it tends to merge the colours into the stream. Aimbot works all the time of course because no visuals.