I've never heard of verification being needed with Bitrefill. I've easily spent well over $1,500 there, although admittedly never in a single transaction. I know that verification is required for using more than $1,000 of FastBitcoins vouchers, which is specified here: https://www.bitrefill.com/fastbitcoins/. You also require verification if spending more than $1,000 directly from Bitfinex, as specified here: https://support.bitfinex.com/hc/en-us/articles/360039873813-Understanding-Bitrefill. I can't find any mention of KYC or verification being needed for any other reason, though.