Profit from performing magic
Indian Ministry of Magic (presumably)
- "The "Snake Summons" spell originated in India and is often illicitly used today by wizards who are called by the Muggle moniker, "Snake Charmers"."
- —A mention of Snake Charmers.
The name "Snake Charmer" was given to them by the Muggles that they entertain. As their work is illicit for breaking the International Statute of Wizarding Secrecy, the Indian Ministry of Magic presumably punish them for their profession.
- Harry Potter Official Website (Mentioned only)