had a similar situation with sportsbet.io (odds automatically lowered for my account, banned from some promotions) and they haven't gone backwards since (more than 8 months).
I had a similar experience, they blocked me from most of their promos(even though I wasn't using any promo in the past, noticed it when I was logged out and they had active promos which I couldn't see when I was logged in lol). That's when I made a switch to some other book because didn't feel respected enough ig
As for Stake, I haven't personally been blocked from any promo or got limited even when I was in good profit for two straight months.
You aren't in much profit either(sorry but a profit of 700 USD isn't reason enough to get personal for a book like Stake imo). But would like to give you benefit of the doubt. Please share some screenshot if you can.
By any chance do you bet on tennis a lot?(have seen a few accounts get in trouble for betting on tennis ~ probably courtsiding or fixed matches).