Scalability is not just about resources. There is such thing as runaway growth, and sometimes spending isn't always the answer.
The current vogue in tech right now seems to be VC funding. People are wary, and rightfully so in many cases, about approaching the IPO front should they get to be that size. VC's offer enticing funding, but from ServInt's perspective (and let me be clear, your results may vary) we've been successful by becoming obsessed with healthy growth.
Slow and steady wins the race as they say.
It also depends on what your goals are. If you're looking to get acquired then why not seek out VC funding? It helps with your valuation and can build a very strong brand. There are very successful companies out there that specialize in targeted acquisitions, the UK2 Group comes to mind, that still have great products and support.
We've been around for a while -- since 1995 actually -- and have experienced just about every potential up and down this industry can provide. Every single success we've achieved ourselves, without funding or loans, and we like the independence that brings with it.
Every company is different however, if you're trying something really new and esoteric...funding can be a terrific avenue as they often have their own followers that can evangelize your product. There's a remarkable startup subculture surrounding VC's that is really fascinating as well.