Schimmi.6872

Can't try it atm, but I think it might be "Use placeables"

It's not random. it happens when you switch from f2p to a bought account or if you directly start on a bought account.

Should be the same, yes - see https://help.guildwars2.com/hc/en-us/articles/230632348-I-Want-to-Change-My-Character-Name

I don't think it's bugged, as there are still players who got the gift of magic. The question is, if both gifts even have the same drop-rate, or if anet adjusted the rate to the prices. But to get an answer to this, much more data would be needed. Even, if they had the same droprate, the chance to get no gift of magic would still be over 3%, so unlucky yes, but I wouldn't call it super unlucky.

The spear may be added to a vendor after some time: From the patch-notes:

Don't think so, as afaik this is part of the protection against payment fraud (so e.g. the TP can't be influenced by accounts bought with stolen CCs).

All (except one afaik) mastery points are also an achievment or part of achievments, so I think that's already an incentive to get them.

No, unfortunately it's not possible (most likely because steam doesn't want to loose their share of the purchases), so if you want to move to a anet account you will need a new one. See also https://help.guildwars2.com/hc/en-us/articles/360053416353-Steam-FAQ Usually the sales should be on steam the same time as in anets shop.

Not for the prices, yes, but you can see the spikes in the supply numbers very well this year

They may not directly, but Unlockers come from BLCs and gems to gold also exists. Also I doubt that anet wants to make gem-shop items always available, they use FOMO in the shop since all the years, so I guess they would have already changed it, if their analysts thought another tactic would be better for their sales. The shield also is still available, just very rare. So if we exclude the gem-shop, cheaper skins and all the items that are still available, it would be what, an unlocker for a total of about four weapon- / armor-skins (scarlet's kiss and the three shoulder skins).

The price and the supply seem to be rather stable this year. There is always a big impact when the new WV rewards are released and I thnk you can actually see the impact of the event too, as the supply went a bit up the last days. But I'm not surprised that the impact of the event wasn't that big compared to the WV, as the maximum was 29 coins I think and we don't know how many people even did the three PoF daylies every day, or the achievment at all.

Have you checked how many skins fit to this description? I only ckecked the list rather quickly, but I think there are currently only four weapon / armor skins which are part of the unlocker, tradable, have a price over 300g and currently no other source.

But if it's for gem shop skins that currently aren't available like your first post says, the selection of the vouchers would usually be enough. There may be some few historical skins in it, but the other thousands are always available. Also if you make the gem skins available all the time, this item will propably be around 800gems+, so how many non gem-shop items from the unlocker are even worth that much (currently 330g+) .

So https://wiki.guildwars2.com/wiki/Black_Lion_Weapons_Voucher but just more expensive and always available and updated?

Are you only harvesting in this hall, or are there others too and which synthesizer levels do they have? Because this way it's hard to say if, it's just a bug that you can use the nodes at all or, if they should give you loot?