Just be aware and always read the ToS, casino nowadays are using this method to encourage user to deposit thinking that it will be just a regular deposit bonus. Always read the fine print.
That is very true. Some casinos would spice their site updates on personal to their customers or the audience and technically believes that the bettors attention would be more focused on the texts sent by the casinos and ignorant of bettors to do their research or probably verifying through the ToS of the casinos becomes a disappointment to the bettor because the story could be a compromise.
Aside that, we can be lured by scammers when we find such email or text as a golden opportunity when we can not compromise to do our proper researches for legal verification.