SSPX at Lourdes

Seeing these pictures, I have to ask why it is that the SSPX are able to hold functions freely in Lourdes whereas ordinary pilgrim groups wishing to celebrate the usus antiquior are presented with difficulties and obfuscation.
Let me be clear; I have no objection whatever to the SSPX celebrating their Masses and other spiritual exercises there. They give a fine example of Catholic devotion with a predominantly young following who offer inspiration to other pilgrims.
But if one of the intentions of Summorum Pontificum was to allow the usus antiquior to be celebrated more freely, and without bureaucratic restrictions, surely it should not be a problem for any group at Lourdes to celebrate Mass in the older form - in any of the chapels that could normally be booked for such groups.