I completed this month’s Adventurer’s Journal fill the bar - between that and the monthly chest bonus I only gained a total of 1,000 traders tender overall.
That means I can buy the pet OR the mount OR the ensemble. I can’t buy the pet AND something.
August (and I think also September?) of last year was the most we were able to collect at a maximum of 1400 Travel Points, converting to 700 Tenders (100 Tender for every 200 TP).
Those months were capped at 1200 total, every other month has been 1000 total (500+500).
Yeah it’s always been 1000 total tenders a month. Occasionally they will offer promotions in the shop such as buying a specific transmog or expansion will earn you some. Even less commonly they will offer bonus tenders to everyone for a particular month.
But those promotions are few and far between and the vast majority of the time the total obtainable tenders is 1000.
If you feel that’s not enough/prices are too high you can make an in-game suggestion or post in the General forums about it. There is an active post with a few hundred replies that might be a good place to chime in.
This is one of the reasons that I wait to do most of my buying until the next month’s items are announced. That way I can know if I need to save for something I want more.