The specific rules have come out, and it is recommended to take a look at the content in the announcement.

This is a general announcement; the products and services mentioned here may not be applicable in your region.
Dear User:
To celebrate the development of the Alpha token ecosystem and reward the most active traders, Binance will launch a limited-time Binance Alpha points event starting May 1, 2025.
Event Duration: From May 1, 2025, until further notice.
During the event, users can earn additional Alpha points through eligible trades. Details are as follows:
Purchase BSC Alpha tokens; and
Purchase Alpha tokens through limit orders (applicable to any network)