This has already been a thing as reported on also the old site, with also a few UFL players moving on from the UFL to the CFL also because the UFL is not going to be paying UFL veterans more money anyway.
Here’s merely one report of many on this front from earlier in this thread.
The UFL is a huge step down in pro football, including even from the NCAA!
What it becomes is up to the current ownership and management, if not simply another NFL Europe and feeder league for the NFL.