To provide a data point, I reserved $6K and received ~$2915. Actually my wife had another $6K reserved, but after the lower pricing and yesterday's tragedy, I thought I would limit our exposure - although I believe in GLOB much more than GPRO long term (though I will probably sell next week and get back in at a later date).
Also will confirm that if you sign up for an IPO and do not confirm, they do just put the money as cash into your account which you can transfer out - they do not reverse the credit charge - not that they ever gave any indication that they would do that.