If you use T Mobile as your cell provider they offer a free subscription to MLB TV every year
That's a nice benefit, but it doesn't actually help for being able to watch Nats games if you live in the DC area, because of the local blackout on mlb.tv.
I get free mlb.tv as a benefit of being a season ticket holder, but it only helps for watching nats games when I'm traveling away from home. I do use if for watching out of market games, for listening to nats on the radio, and for watching nats when I'm away. But I probably wouldn't pay for it if I didn't get it for free, given the blackouts.
I've never messed around with the VPN route, but hopefully if enough people do it, they'll just give up on blacking out local games.