And if your Series A investor denies pro-rata rights to your seed round investors, then it should expect to have its pro-rata rights denied in Series B. Which g

And if your Series A investor denies pro-rata rights to your seed round investors, then it should expect to have its pro-rata rights denied in Series B. Which gives this Series A investor a perverse incentive to set up the company to look better in the short term to get it to Series B, rather than it acting in the IPO-timescale long-term interest of your company!