Beware OK Mobility in Europe

I rented a Renault Captur via OK Mobility, Portugal. The price was E25 per day for 10 days. Great price. Then comes insurance which is billed as "fully Insured"--also E25 per day. Ok... Then when you get to the counter you are told that the fine print limits that full insurance to 90% of your deposit which is E2000. To upgrade to real full insurace costs another E364. They lure one with cheap rates but load the insurance. On my previous visit they charged me E500 to return the vehicle to its original place of rental--1.5hrs drive away--which was also hidden in the fine print.