I have access to Wimbledon Plus. But I do not have to pay to subscribe to it, since I use BT broadband for my access to the Internet. I have been using it over the last couple of days. It only offers a small number of complete matches, say three or four, and these are not live. At least there have not been any live matches shown yet. The complete matches on offer change each day.
There are also interviews with players and highlights of other matches, together with news of each today's events. I presume it would only last for the duration of Wimbledon itself.
There is also Radio Wimbledon, which has been discussed elsewhere in this forum.
Frankly, I doubt if it is worth subscribing to, if you have to pay money.