I've not had any Betfair safer gambling comms for many years, then suddenly out of the blue I received a "your staking is higher than usual" email overnight. I've actually been staking less than normal because I've been on holiday.
Had that about 4 times in the last couple of months, think I got it during Cheltenham too (no shit as obviously bet more when trading that) - definitely feels automated and not something you should worry about.