Is it permissible, Islamically, to subscribe to a cultural competition application if the monthly subscription fee does not equal the size of the certain winnings, which include electrical appliances and mobile phone recharge cards?

This type of competition, where the participant pays a sum of money, is considered forbidden gambling ( Maysir (definition)) by Islamic law. Therefore, it is not permissible to participate in it. Jurists have agreed on the prohibition of gambling (Qimar Maysir). Competitions like these are a form of consuming people's wealth unlawfully (Akl Amwal al-Nas bil Batil (definition)), because every participant pays a sum at risk, not knowing whether they will receive anything in return or not. This is precisely the forbidden gambling.