Nevertheless, just spend less than the said amount limit for a transaction to avoid KYC. If its limit is per day or per month, then I guess KYC is going to be ignored.
This is called structuring which is termed a suspicious activity and there are rules to prevent this by financial agencies. This rule is also being proposed along with the KYC regulation.
Rather than doing this, just avoid U.S based centralized exchanges and use peer-to-peer services which are not regulated.