Scale first, monetize second
venturefizz.com
venturefizz.com
Or fail to materialize altogether. Remember the dot-com bust?
"Scale first, monetize second" can be a recipe for disaster. (It can also work well, but that doesn't make it a general-purpose rule.)
Scalability can be bought, but not without cold hard cash. A decent product and related revenue model has to be built.
Why bother making something scale before you know whether there is demand or profit?
But, scale can also mean "get lots of traffic" -- this is growth, not optimization; in this case, trying to optimize revenue before the growth happens could be considered premature optimization.
I work in the trading business, and in the trading business there's a running joke -- we'll lose money on every trade but make it up on volume! I didn't know people actually practiced such a strategy.
I've seen my share. I won't ever buy into this hype again. You don't open a grocery store without a cash register, why start a website without a revenue plan?
"Monetize" == "create revenue".
You can monetize a free service by charging $1 for it, suddenly start bringing in $1 mill/year ... and still be profit negative because you're spending $2 mill/year on engineering.