Don’t worry, you’re not breaking it to me 😄. I’ve never found the need for more than 10 aliases myself and I could be wrong but I think that needing more than 10 functioning aliases at a given time is a bit of a fringe case when it comes to the average user. It sounds like your comments are based on pretty heavy usage.
I’m not saying that Simple Login is better than the other two services (which I’ve never used so can’t compare) However, from using the free tier of the service for years now the free version of Simple Login is feature complete and does not make you bump in to pay walls.