The rise of fake cryptocurrency apps and how to avoid them

I’m having some doubt about the price feed, to which i can’t found any clear answer.

Obviously someone is paying for updating the feed that we are retrieving for free, in fact i found this discussion where is explained that it’s not really economical or fair for those backers who are paying to support them for everyone else, and an access control will be built at some point.

I’m using price feed on Rinkeby and everything works fine, but what we should do to prepare for the future? Will be possible to use price feed on mainnet without any concerns at some point?