Pros: Extremely simple for the recipient to process a contribution to a politician or a donation to a cause.
Cons: Once the software captures your identification and some contribution history, it plies the 'mark' with email upon email, ostensibly from candidates, soliciting money to be dispensed to Act Blue's account for further distribution. My attempts to be removed from their email lists have been fruitless. Thank goodness for spam blocking services.
I am a loyal Democrat. The use of this type of software has soured me on the Democratic Party because it is so transparently manipulative. I will never contribute to a candidate or a cause that has Act Blue's fingerprints on it.
Overall: Initially I thought it eased my ability to contribute thoughtfully. Then, it became apparent that I was being targeted for support of specific campaigns that were outside my comfort zone. At that point, its drawbacks exceeded its utility.