yes, its very lame. yesterday you could do 20, now its like 3..what the hell? even 20 sucks. i could see limiting it to 50 or 100 but shit man. you'd think you want people using the site for whatever and have a chance at buying something than having them leave for another site because they can't do whois look ups.
It is a really bad thing. I agree to pay some monthly fee for unlimited whois search (if that few would not be higher than few $). Or number of domains in account could be used for allowed number of whois search allowed per day.