Yesterday, I added an option to purchase 10 checks for 1000 sats, or about $1, so no. Honestly $1 is very cheap and by offering the checks for free, I run at an operating loss.
That is totally acceptable, but you should enable alternative payment options that are better for privacy, or have lower transactions fees.
Not everyone is willing to spend bitcoin mainnet for this purpose.
A lot of competitors only display categories, like they say it's from CEX, MIXER, SCAM, SANCTIONED ENTITY, and so on, but my checker actually tells you which counterparties are linked to the address.
That is unique feature, if it is accurate.
Can this detect coins coming from different crypto casinos?