I have been on both sides (significant token buyer, up to 520T a season, and 30T to 54T a season + reward redeem codes; but no surveys in both cases). It won't be fair to group token buyers separately. Users buy tokens to gain advantages - deserved advantages if they used their own money (honestly earned, obtained as gift or other honest ways). This is not cheating.
Also take into consideration that this just a virtual game with no material gains or significant life gains. There is only entertainment and satisfaction (or anger and frustration).