For me the cost in game is irrelevant to the discussion. A3's and RP's increase ticket time, delay other tickets, both of which decreases play time for people waiting on gear, and can be exploited to create illegal links, none of which are desireable.
The cost may be arbitrary to you but I'm sure to some it's a major factor.
I'd also be willing to bet that a3 tickets make up a very small % of tickets, but neither of has the data on this so I guess we'll never know.
It's not hard for me to see the reasoning behind having such an item, it's a cheaper way for players to link up. The price to link every 7 with PLH would be literally over twice as much compared to using a3. I would love something that does this in game tho.
For me, the gear would be under ticket either way. Send max OJ + links ticket at same time and gear will be in WH basically same amount of time regardless.
The incorrect links are the only major issue I have with this item but from all accounts that I've heard since the new ticket format most of these issues have been resolved.
Honestly, this wouldn't effect me either way. I'll have my gear done whether those items exist or not. I do think it's a cost effective way for people to get their gear linked tho (which should hopefully lead to more fully linked ppl in pvp for both sides at some point).