WoWDB

Wormhole Generator: Argus has been hotfixed today to add character level 110 as a requirement.  It was being abused by players who would train Engineering (the toy only requires a skill level of 1) on an alt, use it to port to Argus, and AFK-leech experience points from Invasion points.

/u/usagizero sums it up very well:

Engineering toy, teleports you to Argus, even very low level. Corpse run your way to an invasion, go in. Keep joining parties for that one while never moving in far, rack up xp while afk.

A youtuber and his friends discovered this, and when he did it there was maybe one or two people doing it. Now, everyone knows about it and there are tons of lowbies doing it, to the point where the actual people doing the invasion are having trouble since there are so few people active.

I don't know if it's an exploit, but it's definetly[sic] not what was intended.