Fedora is designed as a relatively stable testing ground for widespread use. It is incredibly unlikely that they'd ever even want to restrict its distribution, and nobody is signing any contracts with Fedora, so they'd have no leverage to stop us from doing it even if they did want to.
Long term who knows what stupid things Redhat might try to get up to, and even if they don't make any catastrophic decisions the whole project could potentially start to drift away from the rest of Linux if they keep making smaller divisive decisions, but that's both unlikely, and in the far distant future if it ever does happen. For the more foreseeable future there is absolutely nothing to worry about with Fedora, other than possibly ethical concerns that you're helping to bug test for the makers RHEL, if you care about that.