Wireless Joint

Just to change ttl? Sure, it will work.

I currently have the cradlepoint IBR600BLP4 with the att ipad plan for my home internet. I've been researching options to change things if and when I get the boot. Is it feasible to simply purchase something like the Archer A7 and run openwrt, keeping the cradlepoint as the modem and allowing me to ...

@BillA is right on, get greedy and you will be booted.

Be careful with the Archer A7. I have two that will not run OpenWRT. Seems V5 works, see here: https://openwrt.org/toh/tp-link/archer_a7

Your router is likely leaking hotspot data through IPv6. Try replacing the existing TTL rules under Network > Firewall > Custom rules > copy and paste this over the entire existing page: iptables -t mangle -I POSTROUTING -o radio usb0 -j TTL --ttl-set 65 iptables -t mangle -I PREROUTING -i usb0 -j ...