You can easily prevent such trial abuse through the tirreno [0] platform, as freshly registered email accounts can be blocked almost in real time.
[0] https://github.com/TirrenoTechnologies/tirreno
(creator of tirreno)
replies(3):
[0] https://github.com/TirrenoTechnologies/tirreno
(creator of tirreno)
This is not about overly promoting the product, it’s about making clear that you are promoting your product (or project, doesn’t even have to be a product).