Try some of these:

https://books.bookfunnel.com/books-to-read-giveaway/uk5ijz1fan

https://books.bookfunnel.com/mages-and-creatures-fantasy-sale-promotion/5v4oqdu9xf

https://books.bookfunnel.com/witchesandwizards/t0jargt3k8

And here’s an ongoing urban fantasy promo good through the end of June:

https://books.bookfunnel.com/bookmojopromo-1/qdrkmm6gap