Actually contrary to the cult belief there is a financial motive behind what the WBC is doing. As you'll see most of the "Church" members are lawyers who use the negative attention gained form their actions to launch various lawsuits.
Cults are one of the things I'll often study in my spare time so I'm well aware of all that as I've done the research.
Being a cult and making money off of your activities are not mutually exclusive. Also, litigation is quite a common tactic for cults that have . Just look at Scientology - out to make money, has a cabal of lawyers at their beck and call to sue anyone and everyone who dares criticize them, and is recognized as a cult by pretty much everyone.
The International Cultic Studies Association has a
cult characteristics checklist, and one of the items is "The group is preoccupied with making money." Having gone over the checklist, the only one I can say for sure doesn't apply to the WBC is "The group is preoccupied with bringing in new members." because they don't seem to proactively recruit.