They could have been offered as payment, and were being dried for the extraction of the fiber to make linnen. Any step in the process would add value to the flax.
Being a harlot would not necessarily require that she be on her back 24/7.
I saw an article a few years back which said some high dollar call girls were also full-time college students, 'working' their way through school. They worked shorter hours for far better pay than their more conventionally employed counterparts.
IF.... this were in the Wall Street Journal or a Forbes business story then I would not 'quibble' regarding the business. However, there can be NO doubt the Heavenly Father touched this woman as noted in Joshua 2:9-13 by her knowledge of who these men were and why they showed up at her business/home. NO pillow talk described.
I can take things as they are, but what I read does not fit the claim she was a hooker.