1. Maybe it's a matter of perspective. I actually find the free plan to be quite restrictive, especially for long term use. The current model is designed to be profitable. The free plan is sustainable.
3. Yes, it's lightweight, fast, and user-friendly. It's quite minimal looking, and I've tried my best to make it as easy to understand as possible. Whether that's through clear and concise instructions along the way, tooltips or intuitive action button colour hierarchy. There's no Windows client because I just haven't gotten to it yet. There's ShareX, which is compatible with Horizon.
Definitely! I think 500MB is more than enough, even as a tech guy, for a rolling storage with oldest giving way to newest. Most people aren't going to upload files as big as 75MB either. Unlimited bandwidth is icing on the cake.
While on the subject, $45 for 100 GB of cloud storage a year is a rip off (no offence). I can (and do) pay $70 for a year of Microsoft 365 Personal which gives me 2TB of cloud storage and the industry standard office suite. I can (and do) pay $20 for a year of Google One which gives me 100GB cloud storage and thus Google Drive and Photos space.
Your pricing by comparison isn't competitive, at least to me. Between an uncompetitive product and a free tier that is (read: should be) more than adequate for most users I'm still curious how secure your financials are.
2. Yes, you can. Just open the web app, click Upload Files, and select what you want. More details here: https://horizon.pics/help/articles/start-uploading-files.
3. Yes, it's lightweight, fast, and user-friendly. It's quite minimal looking, and I've tried my best to make it as easy to understand as possible. Whether that's through clear and concise instructions along the way, tooltips or intuitive action button colour hierarchy. There's no Windows client because I just haven't gotten to it yet. There's ShareX, which is compatible with Horizon.