I have enjoyed the game so far - only 2 races, however with my experience of older GP managment games i actually won my 1st ever race :)
So i decided to subscribe.
I selected the monthly 2.99 fee - i didn't select any bonus points - or whatever they are called, went through my paypal and paid.
After that i got a paypal email confirming payment
You get all the cool stuff up front for free for 10 races I think. So, you are probably still getting all the features for free anyway, maybe it's going to be added to end of your trail period?
FYI - It was most likely a PayPal eCheque. In other words, the subscription doesn't arrive until the payment arrives. It takes about 1-3 days to clear from PayPal usually as they have to withdraw the money from your bank account which is why there is a delay.
So, although it says the payment is successful, the system waits for the actual payment to arrive before creating the subscription. The simplest way to avoid this is to not pay by eCheque. :)