If you are lucky, you may get to withdraw the minimum 0.15 BTC by the time you retire.
Also they claim "4+ years online (the oldest bitcoin PTC site)"
I'll will say bullshit. Unless their domain somehow traveled 2+years into the future.
DOMAIN INFORMATION
Domain:bitsforclicks.com
Registrar:eNom, Inc.
Registration Date:2015-10-05
Expiration Date:2018-10-05
Updated Date:2017-09-06
They were indeed "4+ years online", they initially used the domain coinad.com (which turned into an ad network).
Anyway, it seems bitsforclicks closed, it redirects to a faucet now.