A(nother) polite notice to course and conference organisers
I was once more invited to speak at a "major" quant conference. And once more, I'm happy for this invitation. I answered with the usual "I would be delighted to speak, I have proprietary and timely research that I would happy to present at my usual conditions: fair speaker fee and expenses". They said it was good to have me on board, and asked for the subject and title; I provided (copyrighted) material in relation to a seminar proposal. My name and material was used on the conference website. They also asked me to provide marketing material for their conference. Two months and many exchanges later, where I repeated my conditions. They confirmed my speaking slot, but when I asked to confirm the exact fee and the expenses mechanism, they told me that they plan to discriminate against me (yes, they put the discrimination in writing) and not offer me a fair retribution: " small budget for speakers and I want to increase XXX by supporting some XXX XXX from th