Let's put things into another perspective. One year ago, long before I was employed by them, I was willing to pay for Idokorro MobileSSH, even though it cost vastly more than most telnet/ssh clients. (Except for the very best desktop telnet/SSH clients, such as the Vandyke SecureCRT, which costs the same as Idokorro MobileSSH).
There are people who do not have the time and money to worry about not-officially-supported software and the intricacies of setting up a spellcheck server.
I do understand many people go to midpssh (A free telnet/SSH competitor to MobileSSH) and to bbCorrector (A free spellchecker competitor to SomeDevelopers.com bbSpell) for very same reasons. However, the commercial projects are pretty sustainable, they are simply marketed to different segments of the BlackBerry-using population than for the free products.