From what I have seen the "binding" contract Lucid offered to try to lock the tax credit in won't qualify as being binding according to the IRS guidlines:
Plug-In Electric Vehicle Credit IRC 30 and IRC 30D | Internal Revenue Service
I haven't seen an actual Lucid contract, but the article I saw just said that your reservation fee, $300-$1,000, would become non-refundable, which isn't enough to qualify as "binding".
That would mean that Lucid only qualifies for the $7,500 tax credit for vehicles sold for the rest of this year. And they are only planning on making up to 7k cars this year, and they have already delivered ~1k. So up to ~6k more cars get the credit and then they are cut off.
I wonder how many of their 37,000 deposits will cancel once they find out they won't get the $7,500 tax credit.