Hmmm, this one seems Ok / good idea? The bad part is jails that try to replace in person visits with paid video calls. Besides obvious humanitarian part, preserving inmates ties to family and community is obviously important for eventual reintegration and for reducing offense rates of inmate's children. But here? A letter is a letter and free individuals don't get much physical mail anymore. There are obvious angles…
You could only arrive at your opinion if you think that the US Justice system is fair, and that inmates aren't people. I strongly suggest you rethink this.