1. LeagueCheats as a whole since about 2007, undetected in CSGO for 2 years now.
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.
Its not like antiscreenshot, basically if I were to make a "streaming overlay" it would have to create a invis window on top of the game to draw the cheats on.
This would be for streaming only as doing that is more detectable in the long run and thus wouldn't be set to the default option in the cheat.
For the Pixel ESP settings, it would depend on the map. The default color in pixel 2 is pretty dark and blends with some maps (especially if you are playing in 1080p & streaming @ 720p the dot is mostly lost in compression).