About average actually. Read the excerpt from the legal document filed against him.

“Mr. Durov, 39, who was detained by French authorities on Saturday, was placed under formal investigation on a range of charges, including complicity in managing an online platform to enable illegal transactions; complicity in crimes such as enabling the distribution of child sexual abuse material, drug trafficking and fraud; and a refusal to cooperate with law enforcement.”

It claims complicity in managing an on line platform to enable illegal transactions including child porn. In words that maybe you can understand, they are alleging that a purpose of the site was to enable such transactions.