Endorsements

noun a person who betrays a cause, organization, or principle by accepting compensation in exchange for unethical behavior or disloyalty

verb to betray a cause, organization, or principle by accepting compensation in exchange for unethical behavior or disloyalty

• The company faced backlash after it was accused of being a sell out to corporate interests.
• I can't believe he would sell out his principles just for a promotion.
• Don't be a sell out and join the mainstream crowd.
• Selling out can sometimes mean compromising your values for personal gain.

noun a formal statement or declaration made in support of a particular cause, person, or product

adjective relating to or constituting a testimonial

• The customer provided a glowing testimonial for the company's services.
• I saw a great testimonial on their website about the product.
• That testimonial was lit, bro!
• Her success story served as a powerful testimonial of perseverance.