You can join the waiting list to invest when the amount to be raised in a campaign has already been reached by the various investments and/or investment reservations of other users.
In this case, there will be a button available to join the waiting list on the campaign page:
This means that if investments or one or more reservations are canceled, you may still be able to invest in a project.
Reservations must be secured within a maximum of 24 hours, so when this doesn't happen, users on the waiting list are given the opportunity to invest, in order of their arrival on this list. Find out how investment reservations and their cancellation work here.