You can invest 50$ for example and bet 100$. With an odd around 2x you get a good profit easily. Its other thing if u bet 300$.
On the other question, this is stable tram formation and
they cant kick him. There are only good players and if there is no teamwork the team fails. This is e-sports guys.

If the Op is telling the truth then I am sure that his friend is well aware of all consequences of throwing a match.
No one will be so stupid to throw a match for couple hundreds dollars, when prospect of longer career is an eventuality.
So I expect this is some 3rd grade team, already doomed to lose all the matches they play, so the odds would be really bad.
Yes he knows the consequences of throwing a game, this is true, but how are they going to know hat he made it on purpouse?Nothing will happen to his career if noone understands what happens. And no he is not playing in a 3rd grade team who is doomed to lose all the matches. As i said the odd is good enough.