Humble Bundle debuted in 2010 with a small but cool collection of indie games and has since grown dramatically. It now offers multiple games and software bundles simultaneously, has its own full-fledged digital storefront, and even operates a monthly subscription service. The amount of money raised for charity is also staggering, having raised $195 million to date.

One of the reasons for the service's success is that buyers can split their payments among charities, developers, and the Humble Bundle itself as they wish. If you want to buy a collection of games, but want to donate all your money to Doctors Without Borders (or some other organization), you can do so.

But that may change, as Humble announced today that it plans to do away with the digital "slider" used to distribute payments and replace it with a fixed and very limited percentage.

Humble revealed in a blog post about a month ago that it had hidden these sliders from some users as a test of planned changes to bundle pages. The sudden disappearance of the sliders without notice caused some confusion, for which the Humble team apologized. The Humble team stated, "We should have been more forthcoming about this test."

Testing will continue in May with "a new bundle page that will replace the slider, as well as update the design and add features to better highlight content."

Humble notes that the bundle page has not changed in 10 years. However, the planned overhaul has frustrated many users because it appears to include a strict cap on the amount that can be donated to charity.

"The slider will be replaced with a toggle with a defined division that clearly indicates whether your purchase supports Humble, the publisher, and the charity."

"The "Add to Charity" toggle triples the distribution to charity to 15%.

According to the image showing how the new drop-down menu works, the default donation settings are 5% to charity, 10% to Humble, and the rest to the publisher of the games in the bundle." The "Add to Charity" option triples the amount to charity to 15% ($3.75 for a $25 bundle) and cuts Humble's slice to 5%. This is the only option.

This change has led to some serious backlash on Twitter:

More nuanced conversations have taken place on Reddit, with some users arguing that Humble's open-ended payment option, which has so far allowed purchasers to completely cut off developers and publishers allowing them to cut them off, but speculate that it may simply no longer be feasible. Whatever the reason, the fact that this is almost certainly a loss for charities cannot be overlooked. While large purchases may be a relatively small percentage of the total, a 15% cap on charitable donations would almost certainly put an end to generous users plunking down hundreds of dollars on paid bundles and directing most of it to a charity of their choice.

This could all change: after all, Humble describes this as a test, and clearly very negative sentiment is on display. At this time, Humble has not publicly responded to criticism of this change, but I have asked for comment and will update if I hear back.