Is there cheating going on?

Dotabuff Match 1708109709 http://www.dotabuff.com/matches/1708109709 need to watch in in reborn.

In this match there were all radiant heroes disconnecting all the time besides winter wyvern. How is it possible for wyvern to have such a huge amount of gpm when she only had 15 cs 10 mins in? Especially look at the gold increase at 9 mins and somewhere between 9:45 her gold goes from 450 to 950 instantly and then again by about 1000 gold. players in her team had incredible lag at 5000ms i had none.