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The 150-day bonus is provided to customers who pay full price for a new license that has a term of 12 months or longer.
A renewal product may be unavailable when a customer is ready to renew. In such cases, the only choice is to buy a full-priced license. So, during registration, instead of the discount, such customers get an extra 150 days of use added to their renewal license. The renewal bonus serves as a refund of the renewal discount they would have received had it been available.