It's quite simple to understand the reason why it's license is tagged adware.
Upon installation, it is asked to the user he/she if wishes to install COMODO SafeSurf, which provides protection while surfing - At first, I thought it was something like WOT, Finjan, LinkScanner... But, I was wrong. -, and if users decide to install it, then will also, automatically (opt-in), install Ask.com toolbar. Something not needing for COMODO SafeSurf to protect it's users, which I later found it is related to buffer overflow protection.
But, then again, such protection is already offered by shell code injection protection, part of Defense+. So, why is SafeSurf still bundled with COMODO's suite?
And, Ask.com is not optional. It's installation is forced, if users decide to install COMODO SafeSurf. Later on, for what I could find out, it's possible to uninstall Ask.com toolbar. But, not everyone is that techy.
And, why force people to install an additional security module, which brings no additional security, for the sake of Ask.com? I say force, because, upon installation it is said that it will protect users while they surf, so, why wouldn't they want such protection, right?