This is a global move to relax tourism, Thailand are being smart, I don't agree with the soft side, but a alot of other countries are attracting digital nomads or freelancers who can prove income. Spain are at the forefront in the EU so why not. Yes it's being abused, but it was before. That's not the point, the visa is a positive and good move, it's just a little too relaxed. Some things need to tighten, but that's across the board tbh.
Pretty much the same thing for me in the UK, I read some have taken 24hrs and others over a month, I don't believe there is any reasoning other than like any office, some workers are slow and some are fast, luck of the draw I guess, I'm talking about from point of pending. We'll done anyway it's a breath of fresh air.