It's a tricky spot as a developer. Of course, you want your base product to be attractive and produce great user examples. And, yes, you want your upgraded offer to be even more attractive.
But it's a thin line. The approximately US$250 for the upgraded mics during the intro period can be a lot of money to some prospective buyers, yet some users and VSL staff are strongly encouraging it as the way to go.
Once the intro period is over, this will be more than US$880 for the library.
Would you have paid €740 for it?