I worked for a large CPG company and what you are describing happens everywhere all the time and there is zero illegal about it. It’s called a most favored nation clause and if you do decide to sell lower elsewhere and don’t reduce your price to match (and beat) their competitor, then your MFN customer delists you or stops buying from you.
This is happening constantly with the private label brands you see in major stores. There is no CFPB needed here, Amazon has no obligation to carry your product and can dump you anytime. Why would CFPB get involved?
Some of you are just ridiculous with “get gubbermint involved” on everything. If you want to combat this then don’t buy from Amazon, we don’t need CFPB.