No, of course not. Paying for web services is annoying, we agree. That's why nearly all of InsaneJournal's functionality is available free of charge. However, if you're happy with the service you're being provided, show your support and purchase a Self-committed [paid] account.
It takes money to run websites (for servers, colocation, and bandwidth), and this seems like a better way to pay for it than blasting you with annoying pop-up ads and spamming you with advertisements to your e-mail.
The rates are as follows:
|12 months||$25.00 US|
|6 months||$15.00 US|
|1 month||$5.00 US|
You'll have a hard time finding a better value anywhere. The most annoying part will likely be pulling out your wallet, finding your credit card, and typing in your information.