I am not quite sure why people don't grasp that it's an annual plan for really expensive software. "Annual plan, billed monthly" is about as easy as it's going to be in four words on a button or by a button. If you could rent it for just a month now and then, wouldn't you only rent it in the months you need it? They make it so you can't. There's a solution: DON'T USE IT. Ask yourself seriously: what is it you want to…
> There are all sorts of viable competitor apps > monopoly You lost me there. Are you using a different definition of monopoly than the usual one?
They are a monopoly according to the EU definition (which used to be the UK definition; may still be). They control clearly more than 50% of the market; that is enough to attract regulatory scrutiny as a monopoly.
The reality is that a monopoly need not have 100% control of the market. It is more that they have control over some barrier of entry to the market. That, combined with half the market share, is a powerful tool.
In the case of Adobe, as well as market share, they also have de facto control over a set of file formats that the market depends on (the so-called 'industry standard'). And they have a level of product integration/tying in the Creative Suite that could be monopolistic. That limits the competing apps; they cannot together offer a truly competing suite.
Affinity is I think close to rolling back some of Adobe's monopoly power, because the Affinity Suite is so capable, and it might well be in Adobe's interest to allow them to do that; it certainly must help them when they talk to EU regulators.
The real question is whether they are an "abusive" monopoly. And I don't believe they are quite there yet.
There are some hints that they may risk becoming technically abusive but this "dark pattern" ain't one. One such hint is that you can't buy just the two arbitrary apps you want in the suite -- it's either one app, the photography plan, or the lot.
It is certainly the case that any further acquisitions by Adobe could attract monopoly regulation in the EU.