Additionally, I just posted in the trivia thread the fact that 46 drivers featured in the 1994 season and that that is before factoring in drivers like de Cesaris, Alliot, Herbert and Lehto who drove for two teams that year. Herbert even drove for three.
Seriously, this was the nadir of pay drivers; Taki Inoue, Dominica Schiattarella, Jean-Marc Gounon, Olivier Beretta, Yannick Dalmas, Hideki Noda, Aguri Suzuki, Jean-Denis Delatraz, Frank Lagorce, Andrea Montermini, Paul Belmondo, Roland Ratzenberger, Mika Salo, Philippe Alliot and Phillippe Adams all featured at one point or another.
And that is being lenient to drivers like Ukyo Katayama, Christian Fittipaldi, Eric Bernard, David Brabham, Olivier Panis, JJ Lehto, Pierluigi Martini, Erik Comas, Bertrand Gachot and Michele Alboreto who could meet the definition of pay drivers to varying levels of extent.