Amazon is a pretty horrible value when it comes to MR point redemption. Same likely goes for any of the other store credits options.
If you're under about the age of 70, I'd just hold tight on the points and wait for the world to get healthy again. At this point, you're better off keeping them as a pseudo-currency with multiple travel transfer partner options rather than put them into a travel program that may hugely change terms & conditions or go under altogether (Virgin Atlantic is pretty iffy to survive right now) If you ever want to get rid of the business card, you can keep the MR points transferrable to travel partners with a no annual fee AmEx Everyday card.
Going forward, do some research and brush up on strengths and weaknesses of their transfer programs so you can jump on good deals later in 2021 and beyond. There are some sweet spots in different airline award charts and combined with AmEx's irregular but frequent transfer partner bonuses (BA and Iberia will typically have a 40% bonus offer once or twice a year; Air France/KLM Flying Blue are usually good for a 25% bonus once a year) you can get yourself a lot of fun for a million MR reward points, especially if you have some date flexibility.
'Selling points' or airline award tickets goes against the terms and service of card or travel reward program, no matter what a mileage broker will tell you, and fraud departments at airlines are often very aggressive and very good at weeding out those who engage in such activities and then blacklisting them from programs.
If you're willing to get an AmEx Charles Schwab card for a year, you can turn the MR points into cash via Schwab:
https://thepointsguy.com/guide/cash-...um-for-schwab/