Having automatic system will be better and it can be applied for all bonuses they have such as monthly, weekly or any other bonus. I have to mention shuffle as an example, a casino where I can claim any bonus directly on the VIP page/tab without any bonus link like what Stake do so far. I am sure it has been suggested to Stake since few years ago but seems that Stake still prefer to use the manual system by creating link for most bonuses except reload which should be requested through VIP host (for those who have host).
Well the thing is, it works for stake the way it is, so they don't see it necessary to change it. Also, they have other bonuses like a post and pre monthly from time to time, which wouldn't fit in.
And, the monthly doesn't come on the same date each month, which also makes it more logical to send it separately. Some sites like betfury, BC and shuffle used a set date and have a timer to this date on their site. Stake isn't like that.
They only thing they might change some time soon is the notification messenger. Eddie mentioned some months ago they are not so happy with telegram, because of the sponsored scam links some people pay for which then appear under some official telegram messages from stake. So they might get a new outlet for this or even create their own, that's a possibility.