Dumping operates by selling below cost. If you sell below cost and your competitors don't, nobody buys from them but they still have to pay rent and the salaries of their factory workers if they want to maintain the ability to resume production, which drives them out of business. If you sell below cost and your competitors match you, they lose money on every sale, which drives them out of business.
Then you have no competitors and can start charging the monopoly price, and no one tries to enter the market for fear you'll start dumping again.
Charging nothing for a product with no unit cost doesn't work like that. You're not forcing anyone to sell at a loss and the intent isn't to raise prices after they're gone.
The concern there is that you could come to dominate the market (even if the price remains zero) and then leverage that into other markets. If one IDE has more users than any of the others (market dominance) and it integrates with the vendor's hosting service and their proprietary APIs for their proprietary operating system and their app store and payment systems, that's more like tying than dumping.
Then you have no competitors and can start charging the monopoly price, and no one tries to enter the market for fear you'll start dumping again.
Charging nothing for a product with no unit cost doesn't work like that. You're not forcing anyone to sell at a loss and the intent isn't to raise prices after they're gone.
The concern there is that you could come to dominate the market (even if the price remains zero) and then leverage that into other markets. If one IDE has more users than any of the others (market dominance) and it integrates with the vendor's hosting service and their proprietary APIs for their proprietary operating system and their app store and payment systems, that's more like tying than dumping.