This may be true but shouldn't be read as an indicator of any shady business on Valve's part. Steam makes most of their money from commissions, not developer sign up fees.
Steam sells a lot of games and the game market as a whole is over 70% PC (and about 40% console with overlap).
Steam sells a lot of games and the game market as a whole is over 70% PC (and about 40% console with overlap).