I normally would say it's a bad things for the users when a developer sells their product, but in this case these are payment extensions to WooCommerce so they are something another developer could easily pick up.

It's not the same as if say we sold Gravity Forms to another developer and they could pick up where we left off or do things the same way we did them or as good as we do things.

So kudos to Daniel for taking advantage of a situation that presented itself that could help him and his family.

That being said. Think about it. Those are payment extensions for WooCommerce. They were bringing him $4,000-5,000 per month in revenue and they sell for $50 a pop.

The base version of Gravity Forms sells for $39. Cheaper than the Authorize.Net or PayPal Express Extension for WooCommerce. Maybe Gravity Forms is underpriced as Chris Lema has blogged about... hmmm.