This is fundamentally wrong. I'm an advertiser and I have seen so many Snapchat campaigns work tremendously well for brand advertisers. All for large established brands who are spending solid amounts with the platform.
Much of the hard work is ahead for the platform in terms of measurement and clear steps to defining and achieving ROI metrics such as awareness, brand uplift all the way through to DR elements such as traffic, leads, mobile installs and conversions.
The company makes huge strides very often updating media packs, incorporating measurement (Nielsen) etc. I expect very smart acquisitions in terms of continuing to drive user growth on the consumer side and build out of measurement / ads API to cater to the agency world in the next 12-18 months.
An IPO for snapchat is some time away but it is building a very real commercial organisation amongst brands, advertisers, agencies, the TV community (look at the viacom deal recently).
Also to your point here:
"FB raised 16B in a horribly botched IPO."
You can't say a company raised $16bn and had a horrible IPO. This really doesn't make any sense irrespective of all the ratchets and clawback clauses (none of which will keep any FB exec up at night let alone the CEO). Look at FB today, you should be kicking yourself if you had the chance or even thought about buying the stock at $17 when it was being shorted like crazy by Wall Street.