You've been making posts for months here, and all that content is something you own. It's likely safe here, meaning that tomorrow and the next day, ActiveRain.com will continue to exist. But what if? What if something changed and your data was no longer available to you and your readers?
What you could do is import your posts into
Wordpress, which by the way, is the most popular open source blog software out there. What makes WP different from ActiveRain, Typepad and many others is that it's open source. This means that you can download the software and install it on your website.
WP is simple to install and it's every bit as easy as is ActiveRain to operate. Like all new things, it just takes time to learn.

Wordpress can be installed in five minutes. That's not the hard part. You can find a
excellent templates (how the site looks) in another 10 minutes. That's also not the hard part.
The biggest "ugh" about starting a new web-anything is the learning curve and in this case, getting your data from ActiveRain copied into a new Wordpress site.
I installed a copy of WP on SouthAshley and then did a copy/paste from a few of my posts here. It takes about 30 seconds per post but you'll need some extra time for images. (If you uploaded images to ActiveRain, you'll need to get those to your own website, then update the image link in your post)
Why would you want to do this? If your blogging here has created a following, you might want to lead them to your own website where you can blog with a very specific purpose... and all your posts here are safe for all time... just in case.
One final tip: Unless you're a person that likes to tinker with technology, hire someone to install Wordpress and import your data. Also, in the event you need to have something tweaked in Wordpress, it will be good to have someone who knows their way around. (As a rule of thumb, a basic WP install should cost about $50 and hosting for this, maybe $5 per month. Custom graphics/templates can get expensive, so stick with the free open source stuff until you get the lay of the land)
When you copy and paste them can you date them the original date you wrote them...or do they all show up dated the day you copied them over rather than the date you originally wrote them?