Well, Trustico is a reseller. There's very little to stop them doing anything they want, since they are not subject to CABF regulations.
For example, consider this page: https://www.trustico.com.au/ssltools/create/csr-pem/create-a...
The best part - it doesn't even use browser crypto. The private key is generated server-side and then rendered in the server response.
Private key generation on the reseller-side - what can go wrong.