Mine took 3 days as well.....seems like no one is instant due to processing delays. Once I got my alert on the Experian HP...the account was available online.
Congrats on approval. I've never heard of them... what do they offer? Or are they more like a CreditOne?
CreditXpert Scores: EX  | EQ  | TU  | American Express FICO 8: EX 
I never heard of this company either, 1% on every purchase is good, but this feature to generate a one time use credit card sounds amazing. I joined the waitlist there are 1M people in front of me, I look forward to my approval in one year!
Congrats on the approval. i read the list of prequals on their webiste and they do not ask much from you at all. That list is quite nice to see.