An "online pledge" refers to a promise or commitment made over the internet. It means expressing your support or agreement for a certain cause, action, or idea using a digital platform. Full definition
Generally, those giving money will make online pledges with the promise of pre-buying the product, giving a donation, or earning some type of reward (anything from a free notepad to a free iPod). (inc.com)
While I'd love to volunteer to clean cages and socialize cats or open my doors to a foster, that's just not in the cards for me right now so I was so excited when Anjellicle Cats Rescue put the word out that they were looking for fundraising volunteers to help collect online pledges. (catrescuersfilm.com)
In May, Target's CEO said that an online pledge to boycott the stores over the policy had not effected sales, even though it was signed by 1 million people. (relevantmagazine.com)