Most pools dont pay enough to quit your day job.
Just as an academic exercise, is there a reasonable way to estimate the approximate gross revenue a business like multipool.us generates annually ?
That's very hard especially since this revenue is tied to variations in the value of each cryptocurrency and their profitability at the moment the owners 'cash in'. I'd say it's near to impossible to estimate.
For sure, but if we make some reasonable working assumptions it should be possible to get a ball park estimate.
Skip the fiat conversion problems, just an estimate in coins and assuming something reasonable with respect to increase in difficulty.