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Under its Vision 2030 plan, Saudi Arabia aims to significantly increase the number of Hajj and Umrah pilgrims. Projections suggest that the Hajj and Umrah tourism market could reach a staggering $350 billion by 2032.
https://www.halaltimes.com/how-hajj-has-become-a-billion-dollar-industry-in-saudi-arabia/

Religious tourism as a core growth engine

In Makkah, the Masar Destination project on King Abdulaziz Road, is a $26.6 billion mixed-use corridor, which will host 24,000 hotel rooms and 13,000 residential units, accommodating up to 158,000 pilgrims annually.
Saudi Arabia's stopover program offers 96-hour transit visas with complimentary hotel stays, further supporting extended visits.
https://salaamgateway.com/story/how-saudi-arabia-is-turning-religious-tourism-into-a-growth-engine

More muslims = more customers for Saudi Arabia