do we know how random.com generates its numbers? no number can be purely random, especially one coming from a computer. I know that some programs use a clock by which to begin the number generation process from. so could a pause between rolls 'change' your luck?
i don't know but i assume it sources from a milli/micro/nano second scale so that no 'random number' can appear twice within short time frames.
serarately from this, i have long thought that refreshing the browser seemed to change my luck sometimes. and generally use this only after a long bad spell.