About Artboard size , Thumbnail . and name of asset on Icon set caused contributor account harmful ? ?

Captions are not required. You’re selling icons, not text. If the icons don’t communicate sufficient meaning without captions, they’re not good icons, are they? 

4800 x 4800 pixels =  23 million pixels.

That’s more than enough artboard for vector icon sets. 

BTW, you have enormous competition from other icons. You would do well to find something more unique to submit. Icons have been done to death.

This is what you’re competing with:

https://stock.adobe.com/search?k=icon 151 million results

And most of these are sold in sets, so it’s actually closer to a half-billion icons. Statistically, it’s impossible to get meaningful views & sales from icons. 

Customers want images of people interacting with other people, pets, tools, crafts, machines, etc…  Branch out into other areas. 

I don’t submit vectors myself, but I know that if I attempt to submit an image with a file size that is either too small or too large, the result will. be an error message stating as much. So this might be the case for vectors exceeding 4800x4800. As for your second question, I can’t imagine that including such information would result in a ban.