It means they've seen a reasonable demand for extra inventory, and instead of fixing the inherent problem, they add an additional set of slots for more profit.

I am by NO means against SE's desire for more profit. What I am against, is the desire of profit through selling power to players.

I do not give a crap about paid vanity items. The dyes, the mounts, and minions.
Inventory space, market board presence, and having more active ventures is where it crosses the line.

So, the day they add a paid shortcut to relic weapons, don't complain about that either.

With how games are now days, I wasn't at all surprised by this. And honestly, I didn't even know they had already been offering additional retainers for money since march.
But by increasing the limit to 8, really angers me.

I love this game. Don't get me wrong. But, this double-dipping into the F2P market and the subscription market already angers me.