Does instant actually mean instant, or just "same day"?

[djhead]

Every platform claims instant purchases, and almost none of them mean it. I have had one take two hours because of a "security review", another hold the transaction until the next business day, and a third that showed the crypto in my account but would not let me send it anywhere for 24 hours. None of those are instant. What I actually want is to pay and have the coins land in my own wallet within minutes, with no holding period in between. Does that exist anywhere, or is "instant" just marketing for "faster than a bank transfer"?