What kind of security you guys use in sales page?

[mediamonster]

The thing is letsencrypt is free and may not be as safe as other paid SSL's obviously as you are paying for the others.

But atleast its a real SSL. Cloudflare doesn't provide a real SSL. SSL has to be both sided. One at your end and other at the server end. It only provide SSL for your end. If someday say Google decide to penalize or say mark these type of SSL's unsafe. Then you will see the real chaos.