Grace H.

1. It hides its commercial nature as a certified B corporation. It's actually a for-profit business. In wiki, Change.org claims to be a non-profit in the beginning, but if you read on, it states very clearly that "Change.org is a for-profit, venture-backed company."
2. It asks for donations for a particular legal action against racial discrimination, but when you make a donation, your money actually goes to Change.org instead of funds for that legal action. In other words, you thought you were supporting a petition but you are actually the profit of change.

By the way, while petition might not be the best way to actually make Congress move, they are an effective way to lure an internet user into handing over their personal information.