Hi and my best wishes to the 99NICU community. I think paying a fee is a good thing to do, even to become a new member. Depending on how many people are becoming members, the maintenance of the site would be guaranteed, and access to other revues be considered. The amount you think of does not seem high at least for EU and USA. I would consider free access for people from developing countries, in a further step
Greetings
Pierre