I suppose one possibility is - NV wanted to see what the reaction would be on forums/Reddit/Discord/twitter if they took the FEs off their website. Maybe they were hoping for a weaker reaction, and hoped to stop selling them?
it's an interesting idea, but demand is so high, the reaction was inevitable. nobody wants to see any manufacturer pull out at this time. plus they know the demand for the FEs. so I don't think it's that (that makes more sense when stock gets back to normal). I suspect they implemented new bot protection on their site and didn't want to show their hand too early (it's an arms race after all).
Then they disappear off the site when laptops are added and again the 'no more FEs!' posts start. Personally I think they are just in short supply like many things since last year and both nvidia and AMD just cant make them quickly enough. I'm sure if nvidia wanted to stop selling them then they simply would regardless of what AMD are doing.
, some will lose interest, some will pay scalp aib price from retail/auction website. During this time, NV will characteristically say nothing...