I would like to propose a solution that helps users with massive subscription lists (exceeding 2,000, 5,000, or even 10,000 items) keep track of updates in their followed threads. The forum administration would simply need to upload a daily .txt file listing the names of all models whose threads received new posts over the past 24 hours. Users with more than 2,000 subscriptions could then download this file and locally cross-reference it with their own Favorites list to check for matches.
For example, I have a collection of 5,000 links saved locally on my computer in an Excel file. I download this .txt file. Then, I run a short script on my computer that compares the names from the .txt file with the names in Excel. If the names match, the script generates a link to the model.
Is this option possible with a .txt file?