All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
It is impermissible to subscribe to this fund because the benefit or the interests gained from it are pure Riba because its interest is previously determined as a percentage of the capital without the possibility of increase or decrease. It is impermissible to deposit or invest the collected money at a Riba-based bank. Hence, it is impermissible to participate in this fund as long as this matter is optional. However, it is permissible to participate if the collected money from the subscribers will be invested in lawful channels.
Allaah Knows best.