Shared hosting or cheap VPS?

[mrgtb]

I use shared hosting with the MyBB forum I'm running. I always have done first anyway, thinking that if things pick-up I'll move to better hosting like VPS later on, no point throwing money down the drain at the very start when having no members and a new board on your hands. But the problem now is that forums are dead with nobody wanting to join posting on them because of Twitter, Facebook and other social networking sites these days. You just cannot justify paying more money for VPS to run a forum board anymore.