Players are probably the most unhappy about the fact WOTLK Gold that they will have to shell out $35 per character to "clone" an exact copy of their characters so that it could be played with both WoW Classic servers and Burning Crusade Classic servers. The current WoW Classic servers will be automatically upgraded into Burning Crusade Classic on May 18th, with the patch pre-released.
There is no fee (other aside from the normal cost of a subscription, which includes the possibility of playing WoW Shadowlands, Classic, and Burning Crusade Classic) is required to play Burning Crusade, but for players who wish to be able to play each version of WoW they'll have to pay the $35 fee for cloning. In the opinion of many players, as they've said, the whole Shadowlands expansion costs just 5 dollars more than cloning an existing character, further clarifying how expensive the cost is.
It's a lot for a game that many players were explicitly drawn to due to its absence of additional paid services or cosmetics. Many players on the game's social media are already lamenting the fact that Blizzard seems to be taking the same route with Burning Crusade Classic as it does for Shadowlands along with other recently released expansions.
All that offered the possibility to purchase new mounts, pets along with other in-game items as well as services for real cash. The most well-known WoW creator Asmongold recently revealed in a video that was posted shortly after Blizzard's announcements: "I'm disappointed because I really didn't think this would happen...I did not expect them to complete a 180. I didn't think they would switch from not having microtransactions at all in the game, period, to we are literally selling you mounts and boosts in the gamein just a few hours."
The announcement comes at the same time that the most recent Activision-Blizzard earnings report indicates that the number of active monthly users has dramatically declined compared to cheap WOTLK Gold the same time the previous year. Despite having fewer players, revenues for Blizzard was up 7% year-over-year due to players "participation in value added activities," i.e. microtransactions.