They charge you more for nothing
They sent me a verification mail about my one time support of 200 SEK. Then without my consent they continued to charge me the same amount as a membership fee. Which I noticed two month later. The first withdraw was marked "change.org, petition" and the other two "change.org, membership". Loging in to my account at change.org my credit card was not listed. My only option was to cancel my account. But doing that I did not get a verification mail. So, I was forced to write my bank about how change.org has charge me without my consent. If the bank can't block them from charging me again I will have to get a new credit card.