Yeah, but nowhere near as many issues of the maps. The later non-OS ones are useless, being at too large a scale, and they only feature one Victorian 25-inch map - Old Maps often has ten, stretching over a hundred years - that was the best feature, being able to see changes over time, especially where mines are concerned. Most of the ganister mines in Sheffield for example, only opened between about 1905 and 1940, so you can't see any of those on the NLS site maps as they're too old!
The trouble is, the Old Maps subs model was hopeless - I don't want prints for my wall! I would happily have paid a browse-only subscription, had they ever offered one, but they didn't. You could register, but it was unclear if you had to pay from then on if you didn't want prints - they're just too coy with the relevant info. Their FAQ on subscription just takes you to map print prices, but doesn't mention browsing-only, even though they state enhanced zoom is the main bonus of a subscription! I'm not surprised they're going out of business, as their business model is somewhat bizarre, but their stock is good, and I hope some other means of using the content is produced.
https://www.old-maps.co.uk/#/Pages/Prices
Personally, if I do ever want to actually buy old OS maps as prints, admittedly only of the date released, I get Alan Godfrey maps, as they're very cheap, and very high quality print, and usually with a lot of historical info printed on the back - I have many of thee Sheffield ones, and they're superb for the price:
https://www.alangodfreymaps.co.uk/