The Million Dollar Sellers group convened last week in New York City during and around Amazon’s own Seller Growth Summit event.

MDS, as the 10-year-old membership-based community of Amazon sellers is known, is probably the closest thing there is to a trade association representing the interests of Amazon sellers, according to Eugene Khayman, a co-founder of MDS. Khayman is a longtime seller and founder and CEO of Amazon-native kitchenware brand Eparé.

Perhaps you recall “Million Dollars Sellers” or “MDS” from headlines three months ago. At the time, the group’s members boycotted the Amazon ad platform out of frustration with seller margin compression. Specifically, they were ticked off about an ad platform change that would no longer allow accounts to pay for campaigns using a credit card.

The credit card update was punted from April to August 1, granting the organization a minor victory.

However, MDS members have a wide array of concerns. Three Amazon sellers who spoke with AdExchanger last week each separately described the credit card policy reversal – which removes a loophole whereby Amazon sellers earn cashback bonuses and beaucoup loyalty points from ad spend – as the straw that “broke the camel’s back.”