Given the fact that instawallet was rarely used in the previous few years, I doubt this will have much of an impact on the Bitcoin market: http://www.alexa.com/siteinfo/instawallet.org
Yeah it's only worth $1 800 000. Nothing to worry about.
Sources: https://blockchain.info/address/1LrPYjto3hsLzWJNstghuwdrQXB9... (btc amount) https://blockchain.info/stats (current price)
Faking a high alexa ranking may be possible, but faking a low alexa ranking is not.
You can't fake the fact that next to nobody went to instawallet.
You need to be the sort of idiot who runs feature-free bloatware before you can contribute to their ranking system.