Flew WB from v.91 until 2.0. Left because of price, nothing more. It was still, for the most part, owned and run by HiTech, Pyro and the rest of the old gang. Customer support was still exceptional and there was no real reason for leaving as the game was amazing and connections were good for the time. Of course this was before the net being flooded with new people due to flat rate pricing. Anyways, no I won't fly WB even if it goes flat rate. AH came out and I thought "Wow, HT and gang are back at it again." Well sorta, just Pyro left of the old crew I knew. Still, turned out an excellent product in short time and it will never get old.
So no on trying WB for flat rate or even for free. It's the quality and HTC's excellent abilities that I will follow, not some gimmick. Even WBIII, sure that terrain system looks nice.... that's about it tho! ;-)
-SW