So I've been using CTB for several months now and have accumulated .00907xxxBTC from my mining efforts.
I get 5-5.5k H/s which is a few thousand satoshi a day. i5 9900k OC to 5.0Ghz 24/7
About 2 months ago they released their cloud boost which can increase your hash rate up to 20x
I ran the 10x boost at 23$ a month for a month and was getting the advertised 10x boost upping my H/s to 50-55k H/s
It seems to me that if you immediately cashed out the BTC and sold them at the price as of now you would profit a bit
However that you can only boost for 3 hours at a time and you have to reapply the boost which can be a head ache
I'm sure that I could create a script that would auto apply the boost but of course there would be the risk of getting banned even though they don't mention 3rd party programs in their TOS

TL;DR
What CPU are you using? What hash are you getting? If you could multiply your hash rate would you still profit from the cloud boost at the different tiers?
If you would like to try it please visit the site www.cryptotabbrowser.info