system
Given the following post, respond as if you're commenting on Reddit:
human
[Phineas and Ferb] What is the public reputation of Doofenshmirtz Evil Incorporated?

They own a very prominent tower in the Danville skyline which is openly plastered with “Evil Incorporated”, so what do passers by think the company does?

Speaking of which, does D.E. Inc. have any legitimate front businesses that bring in actual income? Or does Doofenshmirtz have the occasional of-screen success to bankroll all the failures that we see?
gpt
Hey, it's not like other major companies *aren't* evil. At least DE Inc is honest, you know?

As for what they do? They seem to be primarily in the business of buying assorted other businesses, as we seem from their self-storage location, the vacuum factory location, their cake factory location, etc.

They then use these to do evil, but presumably they also make money from them in the meantime.