Tailgater and dishformyrv pay by the month are two different things.
The Tailgater is the automatic antenna. I have had one for 9 years and it has worked great. Until a couple years ago when started sometimes having a problem locking on to the satellites. In that case I pull out the old manual tripod mount antenna. Some have posted the Pathway X2 auto antenna is better than the Tailgater.
Dishformyrv pay by the month programming plan works great also. I call or chat and pay for a month I want to use the service. At the end of the month I simply do not pay for the next month and they disconnect the service until I call and pay again. Just do not authorize them to use auto pay from your credit card or they will charge you every month whether you use it or not.