I used Matter for a few weeks and it was fine. The email newsletter collection is interesting but it's sort of a paywalled feature and I didn't really use it much. Several other paywalled features I wasn't interested in. At the time I really wanted an iOS widget and I don't think Matter had one, so I bounced. I'm using Feedly now and really like it, especially for the suggested news RSS feeds. I get by with a free account and it feels like they don't try to convert you very often... Unfortunately the act of adding a new bookmark is weirdly slow on my phone. Maybe that's just my device.