It never was profitable. ~2kh/s on the $5/mo account..
If you crate 4 droplets (ie 4 virtual cores) you can get 8kh/s, but you are no longer paying $5/mo anymore.
i had 6 khash/s per droplet (smallest one), with 5 droplets i've mined 7,500 coins for around $4 credit, which can sell on ebay for example for $10 or more.
there are a lot of mining factors, the problem is that mining is never the same, difficulty changes, you never know what value will the coin have in the future, it could not be profitable now, but the same amount could be later and so on.
but please don't say it never was profitable since i've used it and it worked - at least for me - of course there is no 100% guarantee
i still have $9 credit left from $15 and i've also mined earthcoin and secondscoin...