HopURL greedy or want to become scam?

I am a bit frustrated .. Today I just found that my linkage using HopURL is not function.. It show this ..

Our Anti SPAM policy doesn't allow live links for free accounts.
In order to enjoy the great benefits of HopURL you must have a pro account.

Huh after using it about 4 months and now they want my money without warning.. I'm totally mad coz they don't give me a warning that my free account can't be using hopurl linkage..
.. My affiliate not working and I've totally lost money coz..

Is it really they become greedy after earn more traffic???

So let's using tinyurl to shorten your link.. Wargh!!!