A little off topic.. but I always 'donate' all my coins saved up. I find it better donated than waste time organising counting/banking etc.. just for a few hundred baht.
Not a lecture.. it is common sense. Lots of people get rejected online for the 90 day report for no apparent reason. Those people generally walk into Immigratioon office, and get the tick of approval for the 90 day reporting with absolutely no hassle, and no fee.