WI - FY on site

Having tried to buy some more wi-fi time I see that I am now requested to enter my phone number and email address. All this for an expenditure of just £5.Yet I can buy a car using the same card without disclosing these two private details. It seems that my club is asking for to much information for this transaction. I, for one am not prepared to leave myself open to unwanted emails & phone calls as my details are sold on to others arround the world.